WeeChat git repositories (weechat, scripts, qweechat) have been moved to GitHub, in WeeChat organization: http://github.com/weechat.
The git repositories on savannah are not updated any more (and will be removed in near future).
The GitHub issue tracker can now be used to report bugs and ask for feature requests.
If the bug/task already exists in Savannah, you can complete/discuss it on Savannah, no need to open a new one on GitHub.
Pull requests are welcome in all repositories, including scripts (except for adding a script, the form on weechat.org must be used).
A page with examples of triggers has been added in weechat wiki.