New theme std:

- [std-theme]: added new theme
- [git-lib]: extended git library
- [vagrant-lib]: added new lib for vagrant

lib/vagrant.zsh

@@ -0,0 +1,15 @@
+function vagrant_prompt_status {
+  if [ ! -f Vagrantfile ]; then
+    return
+  fi
+
+  VAGRANT_BOX=$(grep 'config.vm.box =' Vagrantfile | awk '{print $3}')
+  VARGANT_STATE=$(vagrant status 2>/dev/null | grep default | awk {'print $2'})
+  case "$VARGANT_STATE" in
+      "running")                  VARGANT_STATUS=$ZSH_THEME_VAGRANT_PROMPT_ON;;
+      stopped|poweroff|saved)     VARGANT_STATUS=$ZSH_THEME_VAGRANT_PROMPT_OFF;;
+      *)                          return
+  esac
+
+  echo "default($VAGRANT_BOX): $VARGANT_STATE $VARGANT_STATUS"
+}