Ignore readme files in subdirectories.

This prevents theme and plugin readme files from appearing as new files.
remove ghost.settings and ghost.notifications

covers 90% of #755
- moved ghost.settings to api.settings
- moved ghost.notifications to api.notifications
- split up api/index.js to notifications.js, posts.js, settings.js,
tags.js and users.js
- added instance.globals as temp workaround for blogglobals (Known
issue: blog title and blog description are updated after restart only)
- added webroot to config() to remove `var root = ...`
- changed `e` and `url` helper to async
- updated tests
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

fixes #1575
- Moves most code that was in ghost.js into ./core/server/index.js
- Creates ./core/server/config/theme.js to hold all theme configurations 
(which previously lived on ghost.blogGlobals())
- Removed ghost.server, passing it in as an argument where needed 
and allowing middleware to hold onto a reference for lazy use.
Updating devDependencies to latest versions
Merge pull request #1635 from ErisDS/update-dev-deps

Updating devDependencies to latest versions
Merge pull request #1630 from hswolff/remove-ghost-singleton

Remove ghost.js