Added my own theme file : suvash

Since I store my dotfiles on github
and plan to submodule oh-my-zsh
i supposed it was a good idea to
submit my theme as well.

themes/suvash.zsh-theme

+function prompt_char {
+    git branch >/dev/null 2>/dev/null && echo '±' && return
+    hg root >/dev/null 2>/dev/null && echo 'Hg' && return
+    echo '○'
+}
+
+function virtualenv_info {
+    [ $VIRTUAL_ENV ] && echo '('`basename $VIRTUAL_ENV`') '
+}
+
+function collapse_pwd {
+    echo $(pwd | sed -e "s,^$HOME,~,")
+}
+
+PROMPT='%{$fg[magenta]%}%n%{$reset_color%} at %{$fg[yellow]%}%m%{$reset_color%} in %{$fg_bold[green]%}${PWD/#$HOME/~}%{$reset_color%}$(git_prompt_info) using %{$reset_color%}%{$fg[red]%}$(~/.rvm/bin/rvm-prompt)%{$reset_color%} 
+$(virtualenv_info)$(prompt_char) '
+
+
+ZSH_THEME_GIT_PROMPT_PREFIX=" on %{$fg[magenta]%}"
+ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}"
+ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[green]%}!"
+ZSH_THEME_GIT_PROMPT_UNTRACKED="%{$fg[green]%}?"
+ZSH_THEME_GIT_PROMPT_CLEAN=""