Rename client -> clientold

issue #2271

- should allow development of new admin UI whilst still having access to the old ui
Merge pull request #2274 from ErisDS/ember-rename

Rename client -> clientold
Create base route for ember admin
Add basic template for Ghost admin in Ember

Inspired and derived from:

https://github.com/taras/Ghost/compare/ember-admin
https://github.com/manuelmitasch/ghost-admin-ember-demo
https://github.com/stefanpenner/ember-app-kit
Merge pull request #2269 from hswolff/ember-admin

Ember admin
Move Ember Admin to use es6 modules

- adds required dependencies to package.json
 and to bower.json
- added required Grunt tasks to transpile and
 concat ember admin files
Added directory structure
Merge pull request #2281 from taras/ember

Merged into ember and added directory structure
Update busboy to v0.2.3
Detect tag.hbs template in themes

closes #2320
- changed detection from "tag" to "tag.hbs" in "frontend.js" contrroller
Add test for tag.hbs template.

refs #2321
Change validation for posts 'page' attribute.

issue #2305
- changed validation for 'page' to expect '0' or '1', rather than 'true' or
  'false'
- Added a 'can change a post to static page' test
- Added a 'can change a static page to a post' test
Merge pull request #1 from halfdan/add-test-tag

Add test for tag.hbs template.
Remove unused libraries.

refs #2326
- Remove unused libraries from core/client/assets/vendor/
- Add folder to .gitignore
- bower install is now handled by grunt init
Merge pull request #2335 from halfdan/bower-maeh

Remove unused libraries.
Merge pull request #2307 from Gudahtt/static-page-validation

Change validation for posts 'page' attribute
Fixing CodeMirror paths in GruntFile.js
Merge pull request #2321 from polygonix/2320-detect-tag-hbs
Bower dependency order OCD
Merge branch 'master' into ember

Conflicts:
	.gitignore
	Gruntfile.js
	bower.json
	core/client/assets/lib/showdown/extensions/ghostdown.js
	core/client/assets/vendor/showdown/extensions/ghostdown.js
	core/client/router.js
	core/clientold/assets/vendor/chart.min.js
	core/clientold/assets/vendor/codemirror/addon/mode/overlay.js
	core/clientold/assets/vendor/codemirror/codemirror.js
	core/clientold/assets/vendor/codemirror/mode/gfm/gfm.js
	core/clientold/assets/vendor/codemirror/mode/gfm/index.html
	core/clientold/assets/vendor/codemirror/mode/gfm/test.js
	core/clientold/assets/vendor/codemirror/mode/markdown/index.html
	core/clientold/assets/vendor/codemirror/mode/markdown/markdown.js
	core/clientold/assets/vendor/codemirror/mode/markdown/test.js
	core/clientold/assets/vendor/countable.js
	core/clientold/assets/vendor/fastclick.js
	core/clientold/assets/vendor/icheck/jquery.icheck.min.js
	core/clientold/assets/vendor/jquery.hammer.min.js
	core/clientold/assets/vendor/nprogress.js
	core/clientold/assets/vendor/packery.pkgd.min.js
	core/clientold/assets/vendor/showdown/extensions/ghostdown.js
	core/clientold/assets/vendor/showdown/showdown.js
	core/clientold/assets/vendor/validator-client.js
	core/test/unit/client_ghostdown_spec.js
	core/test/unit/client_showdown_int_spec.js