added directories and code for custom zsh configuration.
adding sample zsh configs.
updated .gitignore
automatically load RVM or rbenv.
added zsh aliases. Moved other files but left symlinks for backwards compatibility.
Merge branch 'master' into zsh

* master:
  yankring history should be hidden.
  added gemrc and updated documentation.
simplifying paths for zsh customization.
updated .gitignore for new zsh paths.
Removed brew and github plugins.

ZSH was becoming slow. Research suggested these plugins were to blame.

http://superuser.com/questions/236953/zsh-starts-incredibly-slowly
merge master
Upgrade haml and fugitive
Added Arpeggio plugin for key chord combos and Filesystem      Size   Used  Avail Capacity  Mounted on
/dev/disk0s2   931Gi  481Gi  450Gi    52%    /
devfs          192Ki  192Ki    0Bi   100%    /dev
map -hosts       0Bi    0Bi    0Bi   100%    /net
map auto_home    0Bi    0Bi    0Bi   100%    /home
/dev/disk1s2    15Mi   15Mi    0Bi   100%    /Volumes/Flash Player
/dev/disk2s2   100Mi  100Mi    0Bi   100%    /Volumes/Google Chrome
/dev/disk4     5.0Mi  2.9Mi  2.1Mi    59%    /Volumes/KeyCastr
/dev/disk5     4.2Gi  4.2Gi    0Bi   100%    /Volumes/Blue in Green
/dev/disk6s2   100Mi   17Mi   83Mi    17%    /Volumes/MacScan Installer and  chords to go to beginning and end of line
Better wildignore for rails projects
Latest version of skwp solarized powerline theme
Ignore images in wildignore
Change window navigation to Ctrl-h,j,k,l to avoid overriding vim defaults [Close #42]
Remove conflicting tab/window management bindings
Substring search
Added color_highlight plugin
Merge pull request #47 from maletor/master

History substring search and other useful plugins.