Minor modification to various classes

Change log:
_main.scss
	added base-font-family variable to html tag
	added position: relative

_reset.scss
	removed force cursor to text on all input

_shared.scss
	removed hr margin rules
Minor changes to classes

Change log:
mixins
	added text-shadow mixin

shared
	altered margin-bottom value

nav
	updated all sub-classes to properly extend .nav base class
Shorter clearfix for IE8+

Changelog:
	removed z-index for IE6/7
	removed :before as it is not necessary for IE8+
Changelog:
	-disabled certain classes
	-disabled text-shadow mixin with ms shadow filter
	-removed IE filters class
Removed color-link mixin for h4,h5,h6
Moved admin.scss and admin classes into inuit folder
Merge branch 'rc1.0'