cleaned up pageCapture doc
added browsingdata tutorial and cleaned up API docs
2 tiny tweaks to tutorials removing support info
added underscore to browsingdata tutorial
Merge pull request #59 from shwetank/master

Omnibox article and small cleanup of stash api doc
Merge pull request #60 from shwetank/master

browsingData, privacy tut and doc
Merge branch 'master' of https://github.com/operasoftware/extension-docs
Merge pull request #61 from shwetank/master

Split contentSettings in doc and tutorial