Switch Ember initializers to public API methods
Hide settings/apps unless apps:true is in config.js

fixes #3031

- Adds an initializer for passing config to the frontend, it's not pretty but it works
- Forwards the apps route and hides the apps menu item if apps:true is not present in config.js
Implements character count helper.

closes #3035
- New character count helper
- Re-add casper test for bio count
- Change settings.general and settings.user to show character count
Trim title in editor on blue/focusOut

closes #3040, fixes #3038
- Properly trim title
- Re-add casper test/adjust where necessary
- Rename gh-focus-input component
Merge pull request #3041 from ErisDS/issue-3031

Hide settings/apps unless apps:true is in config.js
Merge pull request #3043 from jaswilli/initializers

Switch Ember initializers to public API methods
Merge pull request #3044 from halfdan/3035-character-count

Implements character count helper.
Merge pull request #3042 from halfdan/3040-trim-title

Trim title in editor on blue/focusOut
Update shortcut for zen mode

closes #2988

- includes tests
Add fileStorage config to frontend

closes #2956

- adds fileStorage to config passed to ember, and then grabs it in the relevant places.
Merge pull request #3046 from ErisDS/issue-2988

Update shortcut for zen mode
Merge pull request #3045 from ErisDS/issue-2956

Add fileStorage config to frontend
Setting Ghost logo to correct URL
Ember admin works with subdirectory

fixes #3047
Merge pull request #3048 from ErisDS/issue-3047

Ember admin works with subdirectory
Close modals on escape

Closes #3016

- Disconnect modal outlet on escape key in closePopups action handler
Removing console.log
Merge pull request #3053 from jgable/fix3016

Close modals on escape
Ensure incomplete tags aren't lost on save

closes #2991
- moved and separated tags logic from EditorTagsView into PostTagsInputController/View
- call out to PostTagsInputController when saving post to ensure an incomplete tag is completed before save
- added Tab key support for suggestion selection / tag completion
- don't show suggestions list when input field doesn't have focus
- added code for #2172 but left commented-out as it causes side effects with completion on save