Improved ack-grep detection
ZSH config changes

 * activate vi-mode
 * Try to fix path issues
 * Activated ctrl-r search on vi-mode
Better tmux status line
nginx-syntax, ruby refactor and gitv
Use ACK with Unite
Solarized with dark background everywhere
Do not autochange dir (better for Unite)
Better comment config for nginx and dnsmasq
Disable autohighlight on easy tags (consumes too much)
Removed undodir unused options
New mappings

 * ,gb for git blame
 * ,<space> for Sexplore (Instead of neerdtree)
 * removed <space> for za