Add dotfiles-setup and dotfiles-python

The old dotfiles-install task is not dotfiles-setup. It should only be
necessary to call setup once per system.

dotfiles-install now installs the larger/slower packages and
dependencies I need day-to-day but aren't require to have get dotfiles
running correctly.

dotfiles-python will install some useful python versions, and Powerline
which is used in Vim.
Get dotfiles-ruby to install gems
Add support for Go
Move WORDCHARS in to editor module
Add zstyles to configure syntax-highlighting
Add zstyles to configure history-substring-search
Rewrite module gpg-agent; rename it to gpg
Correct syntax error in variable assignment
Add dotfiles-go to install go packages
Install go dependencies by default
Vendor go ZSH support
Add go.vim
Remove go prefixes var
Add script to quickly extract a path from XML
Add unclip script to read textClipping files
Improve usage output from extract-xml
Improve Homebrew part of dotfiles update
Fix setup instructions in README
Install Ruby 2.0.0-p195
Install JRuby 1.7.4