Fix several @Select issues, adding tests for them:
- @Select only worked if @PluralCount was also on the same message
- @Select for long generated a switch statement which doesn't support
long values
- @Select for booleans generated bad code

Review by: unnurg


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10226 8db76d5a-ed1c-0410-87a9-c151d255dfc7