Ignore readme files in subdirectories.

This prevents theme and plugin readme files from appearing as new files.
Merge pull request #1621 from nmec/fix/gitignore

Ignore readme files in subdirectories.
Gruntfile cleanup

issue #1340

- remove old weekly and nightly builds and associated stuff
- add help task
- add more documentation / comments
Upgrade downsize to 0.0.4

refs #1095
- added new unicode test to excerpt helper
Fix error when uploading logo/cover image

closes #1616
- removed pars from model
- changed checkbox handling
Merge pull request #1608 from halfdan/1095-unicode-words

Upgrade downsize to 0.0.4
Merge pull request #1629 from sebgie/issue#1616

Fix error when uploading logo/cover image
Update dependencies.

- Important update for express (contains __proto__ fix in qs)
- Update all other dependencies to latest
Merge pull request #1622 from halfdan/update-deps
Merge pull request #1627 from sebgie/issue#755

remove ghost.settings and ghost.notifications
Merge pull request #1626 from ErisDS/grunt

Gruntfile cleanup
Reverting express-hbs to 0.5.1

- there is some sort of bug with 0.5.2 when combined with recent changes which results in the following error:

/home/travis/build/TryGhost/Ghost/node_modules/express-hbs/lib/hbs.js:128
      if(count < self.partialsDir.length){
                                 ^
TypeError: Cannot read property 'length' of undefined
Remove ghost.js