updated travis

test switching color schemes

t/commands.vim

@@ -24,6 +24,8 @@ describe 'commands'
     Expect g:airline_theme == 'dark'
     execute 'AirlineTheme doesnotexist'
     Expect g:airline_theme == 'dark'
+    colors molokai
+    Expect g:airline_theme == 'molokai'
   end
 
   it 'should have a refresh command'