1.0dev: Added `dgettext` and `dngettext` in babel.js and fixed `gettext` cannot transrate messages for Trac.
1.0dev: Added `dgettext` and `dngettext` in babel.js and fixed `gettext` cannot transrate messages for Trac.

Closes #10749.


git-svn-id: 0d96b0c1a6983ccc08b3732614f4d6bfcf9cbb42@11101 af82e41b-90c4-0310-8c96-b1721e28e2e2

rbaumg/trac,rbaumg/trac,rbaumg/trac,rbaumg/trac