Update when.js dependency to version 3.2.3
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 csrfSecret handling

Closes #2974
-use req.session.csrfSecret instead of _csrfSecret.
-clear username and password properties from the signin controller.
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
Merge pull request #2975 from jaswilli/csrf

Fix csrfSecret handling
Merge pull request #2969 from jaswilli/when

Update when.js dependency to version 3.2.3
Merge pull request #2980 from jgable/lazyLoadDefaultSettings

Lazy load default settings
Merge pull request #2972 from halfdan/2748-featured-post

Implement featured post / page
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
Merge pull request #2981 from jaswilli/fix-observer

Fix removeObserver for title property
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`
Merge pull request #2987 from ErisDS/casper-concise

Show concise casper logs in Travis
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
Merge pull request #2897 from lholmquist/modal_uploader

Modal Uploader
Merge pull request #2985 from novaugust/featured-and-page-cleanup

Cleanup PostItemView code
Merge pull request #2884 from darvelo/sort-posts-list

Get single post from API by id and query params; Auto-sort posts list
Cleaning up the unit tests