Make webkit autocomplete login styles less heinous

Fixes #771
Adding submodule update to grunt init

issue #1053

- not the greatest module, but perhaps one to re-create ourselves in future
Fix image upload issue.

fixes #1377
Add rel='canonical' support

closes #1341
- Added canonical link to header using ghost_head helper.
Merge pull request #1384 from halfdan/1377-fs-extra

Fix image upload issue.
Merge pull request #1388 from germanrcuriel/add-canonical-support

Add rel='canonical' support
Merge pull request #1 from TryGhost/master

Update from TryGhost:master