Add check for display list equals nil

Emacs returns either a sequence of availbale displays or nil. Checking
nil fixes this script to work as expected.
Fixed typos + made wording more consistent in zshrc.zsh-template
New aliases for 'apt-get' and 'aptitude' as they were overwritten by later aliases
Plugin: Rake-fast: Support both *nix and Darwin
`setopt append_history` is not necessary.

Especially given the inc_append_history option, it is not necessary to
set the (default) append_history option.
Add gem build autocompletion
Added link to wiki page for plugins to README.

The wiki is more readable than going to the plugins directory.
fix gnzh theme to detect local rvm installations
added powed command to list pow urls
command to restart pow process
A plugin that makes it easier to interact with the (single) running instance of gvim
Fixed: If you callvim on a non-existant file with a relative path, the CWD of the running gvim process is used, and that's not right.  We use the PWD explicitly instead, in this case
Added an optional callout to the end of the interaction function. I put it in to allow me to put the window focus on MacVim / GVim depending on the different OS I happen to be on
Updated the README to include documentation on the postCallVim callout
Added an <esc> to the begining of everything. I ran something when I was in insert mode once and all it did was shove !args... into the buffer.  <esc> first.
Add completion for pip install -r - so that it autocompletes requirements filenames
Move example plugin to the custom plugins dir.
avoid VCS folders
added completion for all asadmin subcommands
apparently, this file must exist for the plugin to load