add short-starting

.travis.yml

@@ -1,7 +1,7 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.2.5
+  - 2.4
 before_install:
   - rvm @default,@global do gem uninstall bundler -a -x
   - gem install bundler -v 1.10.5

locales/en.yml

@@ -69,6 +69,10 @@ en:
         The Azure instance is not created. Run `vagrant up` to create it.
       short_stopped: |-
         stopped
+      short_starting: |-
+        starting
+      short_started: |-
+        started
       long_stopped: |-
         The Azure instance is stopped. Run `vagrant up` to start it.
       short_stopping: |-