Added new theme Powerline

Powerline theme inspired by the Vim-powerline plugin.

themes/powerline.zsh-theme

@@ -0,0 +1,17 @@
+PROMPT='${SMILEY}$BG[024]$FG[255] %n %{$reset_color%}$FG[024]$BG[102]⮀$FG[255]%m %{$reset_color%}$BG[255]$FG[102]⮀%{$reset_color%}$FG[000]$BG[255] $(prompt_char)%{$reset_color%}$FG[255]⮀%{$reset_color%}'
+RPROMPT='in %{$fg_bold[green]%}${PWD/#$HOME/~}%{$reset_color%}'
+
+function prompt_char {
+    git branch >/dev/null 2>/dev/null && echo '±' && return
+    hg root >/dev/null 2>/dev/null && echo '☿' && return
+    echo '○'
+}
+
+
+ZSH_THEME_GIT_PROMPT_PREFIX="git:(%{$fg[red]%}"
+ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}"
+ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[blue]%}) %{$fg[yellow]%}✗%{$reset_color%}"
+ZSH_THEME_GIT_PROMPT_CLEAN="%{$fg[blue]%})"
+
+
+SMILEY="%(?,$BG[154]$FG[192] ✔ $BG[024]$FG[154]⮀,$BG[131]$FG[255] ✘ $BG[024]$FG[131]⮀)"