Improve oh-my-bash functionality

* Implement aliases, completion in oh-my-bash
 * Added default themes from Bash-it
 * Fixed few issues

themes/emperor/emperor.theme.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+
+SCM_THEME_PROMPT_DIRTY=" ${red}✗"
+SCM_THEME_PROMPT_CLEAN=" ${bold_green}✓"
+SCM_THEME_PROMPT_PREFIX=" |"
+SCM_THEME_PROMPT_SUFFIX="${green}|"
+
+GIT_THEME_PROMPT_DIRTY=" ${red}✗"
+GIT_THEME_PROMPT_CLEAN=" ${bold_green}✓"
+GIT_THEME_PROMPT_PREFIX=" ${green}|"
+GIT_THEME_PROMPT_SUFFIX="${green}|"
+
+RVM_THEME_PROMPT_PREFIX="|"
+RVM_THEME_PROMPT_SUFFIX="|"
+
+function get_hour_color {
+    hour_color=$red
+    min=$(date +%M)
+    if [ "$min" -lt "15" ]; then
+        hour_color=$white
+    elif [ "$min" -lt "30" ]; then
+        hour_color=$green
+    elif [ "$min" -lt "45" ]; then
+        hour_color=$yellow
+    else
+        hour_color=$red
+    fi
+    echo "$hour_color"
+}
+
+__emperor_clock() {
+  THEME_CLOCK_COLOR=$(get_hour_color)
+  clock_prompt
+}
+
+function prompt_command() {
+    PS1="\n$(__emperor_clock)${purple}\h ${reset_color}in ${prompt_color}\w\n${bold_cyan}$(scm_char)${green}$(scm_prompt_info) ${green}→${reset_color} "
+}
+
+THEME_CLOCK_FORMAT=${THEME_CLOCK_FORMAT:-"%H "}
+
+safe_append_prompt_command prompt_command