Major revamp of shell init - drop bash support, focus on zsh

zsh/git.zsh

@@ -0,0 +1,31 @@
+#
+# Git
+#
+
+# Aliases
+alias g="git"
+alias gi="git"
+alias ga="git add"
+alias gb="git branch"
+alias gc="git checkout"
+alias gcb="git checkout -b"
+alias gr="git remote"
+alias gs="git status"
+alias gai="git add -i"
+alias gp="git push"
+alias gf="git fetch"
+alias gd="git difftool"
+alias gpl="git pull --rebase"
+alias gix="gitx"
+alias gx="gitx"
+
+# Git Completion
+if [ -n "$BASH_VERSION" ]; then
+  if [ -f "/usr/local/etc/bash_completion.d/git-completion.bash" ]; then
+    source "/usr/local/etc/bash_completion.d/git-completion.bash"
+  fi
+
+  # Only needed for Bash. Zsh is much smarter with it's auto-completion ^_^
+  complete -o default -o nospace -F _git g
+  complete -o default -o nospace -F _git gi
+fi