Fist pass at fixing the RTL issue using cssjanus

Added cssjanus to create rtl files.
Now we are creating:
_inc/jetpack-admin.css -> _inc/jetpack-admin-rtl.css
_inc/jetpack-banners.css -> _inc/jetpack-banners-rtl.css
_inc/jetpack-network.css -> _inc/jetpack-network-rtl.css
_inc/jetpack.css -> _inc/jetpack-rtl.css
Options: swapLtrRtlInUrl=false, swapLeftRightInUrl=false
and the minified
_inc/jetpack-admin.min.css -> _inc/jetpack-admin-rtl.min.css
_inc/jetpack-banners.min.css -> _inc/jetpack-banners-rtl.min.css
_inc/jetpack-network.min.css -> _inc/jetpack-network-rtl.min.css
_inc/jetpack.min.css -> _inc/jetpack-rtl.min.css

Conflicts:
	Gruntfile.js
	_inc/jetpack-rtl.css
	package.json
Updates to the RTL styling

Added the css.map files, minor tweak for rtl and icons.
Made sure that we includes the genericons.

Conflicts:
	_inc/jetpack-admin.css
	_inc/jetpack-admin.css.map
	_inc/jetpack-admin.min.css
	_inc/jetpack-admin.min.css.map
	_inc/jetpack-banners.css
	_inc/jetpack-banners.min.css
	_inc/jetpack-banners.min.css.map
	_inc/jetpack-network.min.css
	_inc/jetpack-network.min.css.map
	_inc/jetpack-rtl.css.map
	_inc/jetpack.css
	_inc/jetpack.min.css
Added rtl to the watch tasks

Now we get watch
Sass, autoprefix, rtl
Regenerated css, and map files

Conflicts:
	_inc/jetpack-admin.css
	_inc/jetpack-admin.css.map
	_inc/jetpack-admin.min.css
	_inc/jetpack-admin.min.css.map
	_inc/jetpack-banners.min.css
	_inc/jetpack-network.min.css
	_inc/jetpack.css
	_inc/jetpack.min.css
Changes/additions to gruntfile.js

Did my best to get pretty close to WP CSS code standards, but haven’t
figured out how to retain newlines… Yet.

Autoprefixer has been added.

You will need to run `npm install` again. Grunt watch is now 100%
beefier.

Conflicts:
	Gruntfile.js
	_inc/jetpack-admin.css
	_inc/jetpack-admin.min.css
	_inc/jetpack-banners.css
	_inc/jetpack-banners.min.css
	_inc/jetpack-network.min.css
	_inc/jetpack-rtl.css
	_inc/jetpack.css
	_inc/jetpack.min.css
	package.json
Removed jsbeautify

It was causing spacing issues rather than solving them.

Conflicts:
	Gruntfile.js
	_inc/jetpack-admin.css
	_inc/jetpack-admin.css.map
	_inc/jetpack-admin.min.css.map
	_inc/jetpack-banners.css
	_inc/jetpack-banners.css.map
	_inc/jetpack-rtl.css.map
	_inc/jetpack.css
	_inc/jetpack.css.map
	_inc/jetpack.min.css.map
Regenerated css, and map files
like_escape will be deprecated in 4.0
Make the filter more visible

 Added the background colour to the selected filter.
General UI: Making the filter look better

Conflicts:
	_inc/jetpack-admin.css.map
	_inc/jetpack-admin.min.css.map
General UI: Miinor css tweaks to the filer
Regenerated the css and map files
Conflicts:
	_inc/jetpack-admin.css.map
	_inc/jetpack-admin.min.css.map