Fix /bin/sh compatibility issue in install.sh
gitfast: update to upstream v1.8.4

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
don't clobber existing RBENV_ROOT & follow Homebrew's default behavior
Added/modified some useful aliases.
catimg plugin
allow to print an image to the stdout using convert
Fixed a dirs bug for catimg
catimg: fix exit without using source
supresses errors from convert whilen converting, as they
are usually just warnings
Add rdmtc alias for rails plugin.
Add support to command "show"
updated url to latest powerline-patched fonts

clearing up some confusion in issue#1906
corrected branch character

changed ± to 
theme agnoster: remove trailing space

re-implemented expired pull request https://github.com/robbyrussell/oh-my-zsh/pull/1759
highlight the username when root
remove duplicate 'go' plugin, symlink to 'golang'
update golang plugin to match official version
Improve oneline logs

Add decorate and color to the normal oneline and add a new alias for graph oneline logs.
Added Yii basic command completion
Much needed PEP8 love. Use spaces, not tabs.
grab last item in list which is the branch instead of relying on position.
Verification of convert inside the function

Depending on when the path is declared this solution would work in any case