Update when.js dependency to version 3.2.3
Complete moveover to new Notification API format

fixes #2775
- Fix all occurences of notifications.add to use proper API format
Content screen: Featured posts

fixes #2748
- Properly handle marking post as featured/non-featured
- Show correct notifications
Implements page class toggling.

- Toggles page class when post is marked as static/non-static
Fix slug create and update logic for posts

-Remove unnecessary calls to the slug API endpoint on the
 content screen.
-Only make slug API endpoint calls in editor when the post is new.
-Improve logic for when to update the slug.
Fix csrfSecret handling

Closes #2974
-use req.session.csrfSecret instead of _csrfSecret.
-clear username and password properties from the signin controller.
Show notification on successful sign out

Closes #2977
Lazy load default settings

Closes #2061

- Lazy load the defaultSettings value in Settings model
- Populate individual defaults before read/edit
- Populate all defaults before first browse call
- Remove populateDefaults calls from init code
Fix removeObserver for title property
Ember Admin - Upload Modal

Issue #2547
Show concise casper logs in Travis

- Casper logs have gotten too long and no longer display completely
- Implements custom casper.echoConcise which takes account of the concise flag
Cleanup Misc Ember Code

No issue

Misc Places
- Removed expired, irrelevant, and fixed todos

FloatingHeaderPartial
- Fixed "Written" vs "Published" text logic

SettingsGeneralController
- Removed single quotes from property names

EditorBaseController, MarkerManagerMixin
- Aligned var declarations

PostItemView
- Commented out unfunctional code for feature request #2398
- Switched `isPage`, `isFeatured` to be computed properties in `Po
- use `toggleProperty` in `PostController.action.toggleFeatured`
Get single post from API by id and query params; Auto-sort posts list

closes #2883, closes #2951
- introduce custom findQuery in ApplicationAdapter
- posts/post route and editor/edit route now use custom findQuery to find a single post by id with query params
- create a sorting function in PostsController for out-of-order loading
- refresh updated posts in posts.index to make PostsList highlight latest draft after returning from a save in editor
Cleaning up the unit tests
Temporary HTML for the User Management screen & Setup screen
Fixing typo in navbar
Improve error handling during bootstrap process

Refs #2986
-More thorough promise handling in bootstrap.js
-Catch rejected promises from the bootstrap module and force
 a Grunt failure instead of an erroneous success
-Adjust the bootstrap unit tests

fix
Fix deletion of Post Model in Editor and Content screens

fixes #2999
- handle undefined argument in openModal function
- catch whether a model is deleted in Editor routes to aid transition
- move updateTags function to the PostModel
- add call to updateTags in delete-post modal
Implement Shortcuts in Ember

Closes #2988, #2752
Ref #1463, #2984,
 # Shortcuts via Keymaster
- Added KeyMaster to bower dependencies. KeyMaster is a minimal keyboard
  shortcuts library.
- Added `ShortcutsRouteMixin` for routes that will use shortcuts.
  Currently, only routes can have shortcuts. See the extensive comment
  at the top of `core/client/mixins/shortcuts-route.js` for a
  description of how to implement shortcuts.

 ## Other Changes
- Injected popover service into ApplicationRoute
- Created `EditorRouteBase` mixin for the `editor.new` and
  `editor.edit` routes to mixin.
- `StyleBodyMixin` now calls `this._super()` on `activate` and
  `deactivate` to play nicely with other mixins.

 ## Shortcuts and Stubs implemented
 #### Application-Wide
- `'esc':'closePopups'` shortcut **stub** to close popovers,
 modals, and notifcations

 #### Editor Shortcuts
- `'ctrl+s, command+s': 'save'` note that `command` is the
  `meta` key.
- `'ctrl+alt+p': 'publish'`
- `'ctrl+alt+z': 'toggleZenMode'`
Convert general settings page to ember data

Issue #2846
-Implement custom RESTAdapter and serializer for settings data.
-Convert theme selector to Ember.Select.
-Finish upload modal and wire into settings page.