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)
Put all the CSS in one file for the beta header so that it will be easy to pull. Note some of the css here affects other things like the sidebar and the normal header.