This CL (depending on CL 5376090) adds the Maven support for the offline phone number geocoder.
All the geocoding-related code/data is moved to the new directory java/geocoder.
Additionally a pom.xml file is added to java/ and java/geocoder/.
The pom.xml file located in java/ is the parent pom file which contains the configuration (SCM, developers, encoding...) that applies to both the libphonenumber and geocoder modules.
The libphonenumber and geocoder Maven modules inherit from this parent pom file therefore they don't need to duplicate this configuration.
I also moved build.xml and release_notes.txt back to java/.
BUG=57
Review URL: http://codereview.appspot.com/5395054
PhoneNumberUtil.resetInstance() should always be used instead. This omission should not be hidden by unit tests that fork.
That also makes the external version consistent with the internal one in which unit tests don't seem to be executed by default in isolated processes.
Review URL: http://codereview.appspot.com/5341042