Fixed missing retcode function
fix the open command in linux using xdg-open
Merge pull request #1849 from lemieux/master

Fix for Jira plugin on Linux
Update README.textile

Add upgrade command to docs. I canceled the prompt once and went hunting for this so I could upgrade.
Merge pull request #1870 from mfrobben/patch-1

Update README.textile
virtualenvwrapper plugin cleanup

* removes cd override by using chpwd_functions
* removes subshell call to which by using $+commands array and
  c param expansion to find in PATH
* zsh love!
virtualenv cleanup: replaces subshell with prompt expansion.

* :t parameter expansion returns the last portion of the path,
  equivalent to basename. I <3 zsh.
* adds comments for the VIRTUAL_ENV_DISABLE_PROMPT,
  used by virtual_env activate

See also:
  http://zsh.sourceforge.net/Doc/Release/Expansion.html#Parameter-Expansion
Escape both % and $ in the command line

Fixes issue #1884
Merge pull request #1878 from spazm/virtualenv-cleanup

virtualenv cleanup: replaces subshell with prompt expansion.
Merge pull request #1877 from spazm/virtualenvwrapper-cleanup

virtualenvwrapper plugin cleanup
Add new plugin for homebrew installed version of postgres
debian plugin: ignore alias in sudo/aptitude check
Merge pull request #1893 from jeremydt/postgres

Add new plugin for homebrew installed version of postgres
Merge pull request #1894 from codewhale/master

debian plugin: ignore alias in sudo/aptitude check
Merge pull request #1885 from eakret/termsupport-fix

Escape both % and $ in the command line
Merge pull request #1756 from rkj/master

Fixed missing retcode if you tried to use themes/rkj
Added my own theme based on powerline and changed install script to
point to my repo.
Added my custom autocomplete and options plugins
Stop autocorrecting certain cmds
updated install.sh to use bash