Merge branch 'feature/autokey_fixed'

* feature/autokey_fixed:
  lib/schemaPlugins autokey: Added 'fixed' attribute to control if the value should be changed on update
document 'cloudinary folders' option
document cloudinary 'publidId', 'folder', 'autoCleanup', 'select' and 'selectPrefix' options
fixed cloudinary select option styling, rolled back by #530
Fixing Keystone 'cloudinary folders' and Cloudinary.Image 'folder' option
fixing issue #597 regarding cloudinary caching
Merge pull request #596 from JohnnyEstilles/fixing-cloudinary-folders-option

Fixing 'cloudinary folders' option
Merge pull request #594 from JohnnyEstilles/document-cloudinary-options

Document cloudinary options
Merge pull request #599 from JohnnyEstilles/fixing-issue-597-cloudinary-caching

Fixing issue #597 regarding cloudinary caching
Merge pull request #595 from JohnnyEstilles/fixing-cloudinary-select-styling

Fixed cloudinary select option styling, rolled back by #530
Adding note about WYSIWYG config options
fixed reference to travis-ci build status image
added mpromise
fixed issue #598 unexpected behavior replacing cloudinary image
Merge pull request #602 from JohnnyEstilles/fixing-readme-build-status

Fixed reference to travis-ci build status image
Merge pull request #603 from JohnnyEstilles/fixing-issue-598-cloudinary-unexpected-upload-failure

Fixing issue #598 cloudinary unexpected upload failure
Merge branch 'master' of https://github.com/JedWatson/keystone

* 'master' of https://github.com/JedWatson/keystone: (47 commits)
  fixed issue #598 unexpected behavior replacing cloudinary image
  added mpromise
  fixed reference to travis-ci build status image
  Adding note about WYSIWYG config options
  fixing issue #597 regarding cloudinary caching
  Fixing Keystone 'cloudinary folders' and Cloudinary.Image 'folder' option
  fixed cloudinary select option styling, rolled back by #530
  document cloudinary 'publidId', 'folder', 'autoCleanup', 'select' and 'selectPrefix' options
  document 'cloudinary folders' option
  Fixing attribution
  v0.2.27
  Updating Changelog
  Updating dependencies
  Update form.jade
  add preview for embedly field
  moved wysiwyg to configuration.jade
  Revert "docs for wysiwy-modes"
  Revert "corrected grammar"
  corrected grammar
  docs for wysiwy-modes
  ...
Docs: updated with the "autokey: fixed" option
added ability to filter relationship by any input field or _id
added docs for relationship filters