extend mercurial plugin to be more like git/svn

implement in_hg(), hg_get_branch_name(), hg_prompt_info(), and hg_dirty() for the mercurial plugin
named functions similar to subversion plugin, to give theme maintainers an easier life
Fixed missing retcode function
Uncomment l alias
eliminated unnecessary cd and failing substitution

Changing the working directory in a sub-subshell
does not change the working directory of the executing
shell.

The substitution was broken for me on _all_ my machines,
so I started looking into the business.
Adding a fix for the DISABLE_UNTRACKED_FILES_DIRTY option.
Merge pull request #1775 from marcusmueller/fixupgradetool

fix for failing substition & eliminated unnecessary cd
Merge pull request #1834 from croach/disable_untracked_files_dirty_fix

Adding a fix for the DISABLE_UNTRACKED_FILES_DIRTY option.
fix the open command in linux using xdg-open
Merge pull request #1849 from lemieux/master

Fix for Jira plugin on Linux
Added alias for git clean
New plugin for git-repo (https://code.google.com/p/git-repo/)

Signed-off-by: Gaetan Semet <gaetan@xeberon.net>
Improvement in the git plugin

Signed-off-by: Gaetan Semet <gaetan@xeberon.net>
A cabal plugin based on the lein plugin
Fixed color on git prompt for superjarin theme
Adding testlog and prodlog.
Update README.textile

Add upgrade command to docs. I canceled the prompt once and went hunting for this so I could upgrade.
Update the character used in powerline

The code points have been updated in 53fbfe1, see
- https://github.com/Lokaltog/powerline/commit/53fbfe15fead8cc7598bcb4ee9714a221ab7e446
- https://github.com/Lokaltog/powerline/issues/4
Update bundler.plugin.zsh

Added berks, foodcritic, kitchen, and knife commands to bundler plugin.
Update bundler.plugin.zsh

Added strainer & tailor to commands in bundler plugin.
Merge pull request #1870 from mfrobben/patch-1

Update README.textile