Issue/1007: Corrected the behaviour of the HOME and END keys on the CodeMirror editor by overriding their calls in the extraKeys config of the editor
Replace new-lines with spaces in excerpt helper.

fixes #531
Add core/server.js to grunt watch
Allow only images to be uploaded in the upload modal

Fixes #1221

- This changes the accepted encodings on the files upload input field to
  be only "image/*" now
-
Merge pull request #1222 from mduvall/encoding-image-upload

r# the commit.
Merge pull request #1253 from halfdan/gruntfile-watch

Add core/server.js to grunt watch
Merge pull request #1245 from StevenMcD/issue/1007

Issue/1007: Corrected the behaviour of the HOME and END keys on the Code...
Merge pull request #1252 from halfdan/531-lines-to-spaces

Replace new-lines with spaces in excerpt helper.
Keep style consistent
Merge pull request #1251 from sebgie/api-refactor-move

Move /api to /ghost/api
Merge pull request #1264 from ryanseys/patch-1

Keep style consistent in package.json
Replace cookieSession with session

closes #1230
- changed cookieSession to session
- added session.regenerate for login and logout
- added bookshelf session store
- added session table to migrations