Merge pull request #151 from yin8086/ChineseTrans

fix some Chinese translations due to some special characters.
Remove garbage from a bad squash & cherry-pick
Do not send ticket emails to disabled users
Documentation
Fix NPE in the Edit Ticket page
Conditionally hide the propose patchset instructions

There are a few scenarios where a ticket without a patchset should not
display propose instructions.

1. the ticket is resolved
2. the repository is configured to reject new patchsets or is read-only
3. the server is configured to reject new patchsets
Display an explanation in ticket page if the user can't propose commits
Fix NPE in bugtraq processor
Fix 'head' vs 'HEAD' commit resolution
Replaced uploading to GoogleCode with uploading to Bintray on release
add Chinese strings