Merge pull request #34 from shwetank/master

Added info about preferable screenshot size
added search functionality
added link to read me
replaced local bootstrap and jquery with CDN links
small fix to header arrow
added link to front page
various fixes to management page
removed all references to declarativeWebRequest.html
removed some text about manifest version
typo fix
boatload of spelling, style fixes
Merge branch 'master' of https://github.com/operasoftware/extension-docs