MUMUP-1165 : Added beta rollback header to /web

Mockups: http://9zfgcz.axshare.com/#p=myuw_beta__mobile__header_placement_

Desktop view:

![image](https://cloud.githubusercontent.com/assets/3534544/4533686/2b263be2-4d9e-11e4-970d-d039f919daea.png)

Mobiles view:

![image](https://cloud.githubusercontent.com/assets/3534544/4533692/40f94e8c-4d9e-11e4-8d67-296a98a4b624.png)


Also fixed two minor things:
+ local grey-jean.png instead of internet resource
+ changed misspelling of console, for the logz (lolz)