Change Generator.getAccessedPropertyNames() return type to Set<String>

Generator is a public API class and we don't want to encourage end
users to need to import from com.google.gwt.thirdparty.guava, so we
need to define the API around Set instead of ImmutableSet.

Also, remove the overload in InlineClientBundleGenerator.

Change-Id: I11741a8c1e0dccd3f2ac2dae68455aee7441dba5
Added support for deploying snapshots to maven repositories.

Note that this still does not support deploying snapshots locally.

Change-Id: Iab382becde1fdcb9a505937c7862ce1a3f937035
GWTify name and URLs in POM files

Change-Id: I66ce016d1b136bd1fbc25695585eecab15639ca2
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/andrestesti/gwt-rebindmethods