Adding a little documentation for the git themes

git.zsh

-#
+# Varables for themeing the git info prompt:
+# ZSH_THEME_GIT_PROMPT_PREFIX - Prefix at the very beginning of the prompt, before the branch name
+# ZSH_THEME_GIT_PROMPT_SUFFIX - At the very end of the prompt
+# ZSH_THEME_GIT_PROMPT_DIRTY  - Text to display if the branch is dirty
+# ZSH_THEME_GIT_PROMPT_CLEAN  - Text to display if the branch is clean
+
 ZSH_THEME_GIT_PROMPT_PREFIX="git:("
 ZSH_THEME_GIT_PROMPT_SUFFIX=")"
 ZSH_THEME_GIT_PROMPT_DIRTY="*"