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.

- LOGGER -> logger
- Small comment fixes
- Style-guide-recommended formatting changes
- Removal of duplicate, unneeded method in PhoneNumberToTimeZonesMapper.java for canBeGeocoded, using phoneNumberUtil instead.

We remove the dependency on protobuf (protobuf-javanano) from the Java library, resurrecting java/libphonenumber/src/com/google/i18n/phonenumbers/Phonemetadata.java which was present until libphonenumber-7.1.1.

Does not affect the C++ or JavaScript libraries.

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.

cherry-pick of googlei18n/libphonenumber#884

No change in functionality.

Review URL: https://codereview.appspot.com/6350083

- Make command line parameters named instead of positional.

- Move all information about paths, names, etc., from being hardcoded into the
  tool itself to command line parameters, so that new files in the future can
  be generated by just adding build rules for them without having to update the
  tool.

- Not hard-code class or package names, but get them from the Class object.

- Break code generation up into smaller parts, to make it easier to extend the
  code generation and share code while generating different classes.

- Update BuildMetadataFromXml to not output empty region codes.

- Generate either a Map or a Set, depending on whether the mapping table
  actually contains any data or not.

All files generated by the tool remain identical to before this change.
Review URL: https://codereview.appspot.com/6343066

Review URL: http://codereview.appspot.com/5532089

Review URL: http://codereview.appspot.com/5193044