Fix for getNationalSignificantNumber to be robust in the face of malicious input (negative number of leading zeros in the phone number proto).

* isNumberMatch fix for numbers with italian leading zero fields set. Only
affects people who haven't correctly constructed phone numbers using
methods like 'parse'.
* Adding C++ tests and fixing bug in ExactlySameAs method, which wasn't
updated to handle the number_of_leading_zeros field when that was added
to the phone number proto.

See pending_code_changes.txt for more details.

* Support semicolon as extension character while parsing

* Add notes to pending_code_changes.txt

* JS port: Support semicolon as extension character while parsing

* Update comments in phonenumberutil.js

This excludes editing the proto file itself, or the auto-generated or hand-crafted fields that are derived from it.

Metadata changes:
-- Drops the "-1" that was erroneously included in possible lengths before (didn't break anything, but was wrong) - it was a possibleLength of a sub-component so got added to the generalDesc possibleLengths
-- possibleNumberPattern no longer inherited: we don't use this anyway, we will do another CL soon to stop including it at all in the generated metadata
-- exampleNumber is no longer set on fixed-line and mobile elements from the generalDesc

XML file changes:
-- Stopped specifying "NA" and "-1" specifically for fixed-line and mobile blocks; now they are treated as every other type of phone number: if missing, don't fill them in from generalDesc, but leave them missing.

Code changes:
-- Stop using the exampleNumber on generalDesc for non-geo entities, but look at their phonenumber descs - the exampleNumber won't be stored on the generalDesc anymore. This affects porters if they either copied our build logic or used our built metadata in some way; they should update this method in their port too.

-- changing to use ULL in test numbers so this compiles on all platforms (fixes issue #1334)
-- updating a couple of test-cases/comments to bring inline with Java

https://groups.google.com/forum/#!topic/libphonenumber-discuss/75TOpTFVi08

* Initial code changes to support the new possibleLengths infrastructure
when building metadata. Includes setting these in the main metadata
file and changing the code to populate them in the PhoneMetadata proto
at build time. Updating tests for Java.

* Updating comment about the possible_lengths_local_only field.

* Adding the generated jars that build files containing the new possible
lengths fields.

* Rebuilding short-number metadata with the new proto field. Not doing
this at release time so we can see what changes in the metadata are due
to metadata fixes, rather than this possibleLengths field.

* Regeneration of phone number metadata with the new possible length
information filled in.

Includes some possible length changes for KR and BY, and a validation
fix for NA where a digit was missing.

* Updating the test proto metadata files with the new possible length
information.

* Added notes about the code changes.

* Regenerating C++ metadata with new possibleLength info and updating unit
test to check this works.

Making function IsNumberGeographical public. This function operates on
the type of number and the country it belongs to only, so may have some
false positives.

Using this in the geocoder so that geocoding now limited to numbers that
we consider geographical, based on their type and country, rather than
just based on their type. The C++ geocoder did not previously check the
number type/country at all.

Indonesian and Chinese mobile numbers have now been added to the list of
possibly-geographical numbers.

* New useful getExampleNumber methods (for testing) - one for invalid
  numbers and one for getting a number of a particular type without
  specifying a country.

Review URL: https://codereview.appspot.com/96510044

This CL ensures that:
- All declarations in headers are made in the i18n::phonenumbers namespace.
- All USE flags/macros are prefixed with I18N_PHONENUMBERS_ to avoid name
  clashes.
- All the code in base/ is actually used (by deleting unused code).
- Outdated occurrences of USE_GOOGLE_BASE don't exist anymore.
- Logging in PhoneNumberUtil is disabled by default (in production). However it
  can be enabled by calling PhoneNumberUtil::SetLogger() as it is now done
  during testing.

BUG=http://crbug.com/236272
R=jia.shao.peng@gmail.com

Review URL: https://codereview.appspot.com/9162043

Review URL: https://codereview.appspot.com/7570043

Note that the metadata files were not uploaded to appspot because they were too
large. Here is the list of the files affected by this change (generated by
Git):

cpp/src/phonenumbers/lite_metadata.cc
cpp/src/phonenumbers/logger.h
cpp/src/phonenumbers/metadata.cc
cpp/src/phonenumbers/phonenumbermatcher.cc
cpp/src/phonenumbers/phonenumberutil.cc
cpp/src/phonenumbers/phonenumberutil.h
cpp/src/phonenumbers/region_code.h
cpp/src/phonenumbers/stringutil.cc
cpp/src/phonenumbers/stringutil.h
cpp/test/phonenumbers/asyoutypeformatter_test.cc
cpp/test/phonenumbers/phonenumbermatcher_test.cc
cpp/test/phonenumbers/phonenumberutil_test.cc
cpp/test/phonenumbers/stringutil_test.cc

This CL also fixes the issue reported by Aaron about the logger being invoked
before it is initialized.

Review URL: https://codereview.appspot.com/5786065

Review URL: http://codereview.appspot.com/5445043

Review URL: http://codereview.appspot.com/5372051

Review URL: http://codereview.appspot.com/5303049

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