add ohmyzsh, robbyrussell theme

themes/robbyrussell/robbyrussell.theme.bash

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+SCM_THEME_PROMPT_DIRTY=" ${bold_yellow}✗"
+SCM_THEME_PROMPT_CLEAN=" ${bold_green}✓"
+SCM_THEME_PROMPT_PREFIX=" ${bold_blue}scm:("
+SCM_THEME_PROMPT_SUFFIX="${bold_blue})"
+
+GIT_THEME_PROMPT_DIRTY=" ${bold_yellow}✗"
+GIT_THEME_PROMPT_CLEAN=" ${bold_green}✓"
+GIT_THEME_PROMPT_PREFIX=" ${bold_blue}git:("
+GIT_THEME_PROMPT_SUFFIX="${bold_blue})"
+
+RVM_THEME_PROMPT_PREFIX="|"
+RVM_THEME_PROMPT_SUFFIX="|"
+
+function git_prompt_info {
+  git_prompt_vars
+  echo -e "$SCM_PREFIX${bold_red}$SCM_BRANCH$SCM_STATE$SCM_SUFFIX"
+}
+
+
+function prompt_command() {
+    PS1="${bold_green}➜  ${bold_cyan}\W${reset_color}$(scm_prompt_info)${reset_color} "
+}
+
+PROMPT_COMMAND=prompt_command;