major restructuring of files; see notes

- deleted unused app.css and bootstrap css

- moved contents of ui directory to scss/exai to discourage overwriting exai files. new development should occur in the now-empty ui directory

- set exai defaults

- create _exai.scss, set up similarly to _inuit.scss with grouped imports and TOC
fix sidebar display

was set to display if exai_display_sidebar() returned FALSE instead of true (for testing sticky footer)
exai needs some of inuit's options turned on by default

remove those options from the main vars partial and set them as defaults in exai/defaults
exai defaults must be imported before inuit

such is the nature of building a framework on top of a framework...
reduce specificity of .brand, remove padding
reduce specificity of nav menu levels
give primary navigation top level ul a class
use BEM syntax for primary nav class
remove font awesome dependency and replace with utf-8 fallbacks
add credit and link to bfrost's nav pattern
actually remove font awesome submodule!
remove ubuntu mono dependency
don't give container a background, add a root class and style that.
use $brand-round in forms, move forms to assets/components, color for nav a:visited, change order of imports
apply pane padding to pane content
roots: Search form support for WordPress 3.6+

https://github.com/Foxaii/roots/commit/61f2296a75a721479777080aeb050ebbd48058e5
roots: fix Roots_Walker_Comment issue with WP 3.6

https://github.com/retlehs/roots/commit/27a44d14af9e8a0c4c7c1c23166d6a3be63218be
fix fatal error caused by missing opening comment
fix fatal error caused by missing opening comment
Merge branch 'refs/heads/experimental'