Merge pull request #73 from shwetank/master

Tutorial and doc for inline installation stuff
Merge pull request #74 from shwetank/master

Adding inline install to sidebar, fixes to sample code in tut
Allow deploying to production by entering `grunt deploy`
Move extension docs to `/extensions/`
Don’t exclude PSD files

Heh, double negative.

Closes #76.
grunt-rsync: `chmod` new files

Ref. https://github.com/operasoftware/extension-docs/issues/75 and https://github.com/operasoftware/devopera/issues/40.