* [WIP] Igloczek styles cleanup (#5354)

* WIP: Styles architecture cleanup

* Fix build

* Move the reset to css on client

* moving some CSS from api.addAssets to api.addFiles

* moving more files to built time compilers

* Restoring clearfix

* moving more files to built time compilers

* moving more files to built time compilers

* move fontello to theme package

* Renaming files to preserve git history

* Renaming files to preserve git history

* using min to preserve history

* Fix lint

* organizing

* Renaming files to preserve git history

* Renaming files to preserve git history

* Fix lint

* Fix lint

* Renaming files to preserve git history

* Moving another less file to cue compiled at build time

* Fix lint

* Moving another less file to be compiled at build time

* adding some part of lesshat into temp mixings

* Put transitions back with some temp redundant mixing

* commenting out unused mixings

* removed unused mixings from lesshat

* Fix lint

Fixed the font path in the demo html file

I moved the google icon and the cake icon to other locations that doesn't have the bidi-mirror feature.

Remove the icons that are not mirrored to regular locations. And moved the icons that need mirroring to mirrored locations. Replaced "octicon-chevron-right" with new set of mirrored icons from fontello

Based on issue #688 advice, used webfont-dl to download roboto font and
modified base stylesheet to reference roboto locally instead of
referencing Google hosted version.

Used webfont-dl with url
http://fonts.googleapis.com/css?family=Roboto:300,400,500,600,700&subset=latin,cyrillic-ext,greek-ext,greek,vietnamese,latin-ext,cyrillic
to download Roboto font to local directory.  Url originally declared in
base.less.

The url requestd 300,400,500,600, and 700, but it looks like only
300,400,500, and 700 are supported.