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
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
Adding missing loader.js
Add admin prototype

issue #2270

- from https://github.com/manuelmitasch/ghost-admin-ember-demo
- Not working properly: added ic-ajax mock in app.js but promise not resolving => loading route always active
Minor refactoring of the routers:

- Moved post route under posts resource
- Changed ajax to use ic.ajax.request instead of ic.ajax.raw
Amend fixtures & put body classes in styleBody mixin

- Change fixture response of posts route to actual format.
- Extracted classNames logic of routes into style-body mixin.
- Additionally replaced all double-quotes with single-quotes for style conformance.
Merge pull request #2357 from ErisDS/ember-with-proto

[Ember.js] merging prototype
Specify `itemView` on the `each` helper rather than nesting a `view` helper.

This avoids the creation of two views per row, which will make a big difference for large blogs.
Merge pull request #2374 from ebryn/posts-item-view

Specify `itemView` on the `each` helper rather than nesting a `view` helper
Merge branch 'master' into ember

Conflicts:
	.gitignore
	.npmignore
	Gemfile.lock
	Gruntfile.js
	bower.json
	core/clientold/assets/fonts/icons.dev.svg
	core/clientold/assets/fonts/icons.eot
	core/clientold/assets/fonts/icons.svg
	core/clientold/assets/fonts/icons.ttf
	core/clientold/assets/fonts/icons.woff
	core/clientold/assets/sass/ie.scss
	core/clientold/assets/sass/layouts/auth.scss
	core/clientold/assets/sass/layouts/editor.scss
	core/clientold/assets/sass/layouts/errors.scss
	core/clientold/assets/sass/layouts/manage.scss
	core/clientold/assets/sass/layouts/plugins.scss
	core/clientold/assets/sass/layouts/settings.scss
	core/clientold/assets/sass/layouts/users.scss
	core/clientold/assets/sass/modules/animations.scss
	core/clientold/assets/sass/modules/breakpoint.scss
	core/clientold/assets/sass/modules/breakpoint/_context.scss
	core/clientold/assets/sass/modules/breakpoint/_helpers.scss
	core/clientold/assets/sass/modules/breakpoint/_no-query.scss
	core/clientold/assets/sass/modules/breakpoint/_parsers.scss
	core/clientold/assets/sass/modules/breakpoint/_respond-to.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/_double.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/_query.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/_resolution.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/_single.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/_triple.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/double/_default-pair.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/double/_default.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/double/_double-string.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/resolution/_resolution.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/single/_default.scss
	core/clientold/assets/sass/modules/breakpoint/parsers/triple/_default.scss
	core/clientold/assets/sass/modules/forms.scss
	core/clientold/assets/sass/modules/global.scss
	core/clientold/assets/sass/modules/icons.scss
	core/clientold/assets/sass/modules/mixins.scss
	core/clientold/assets/sass/modules/normalize.scss
	core/clientold/assets/sass/screen.scss
Add HTML5 pushState support for Ember

- also updates associated route
Ensure grunt-contrib-watch watches appropriate files
for re-building ember admin when files change