Added hsla and floating point color expressions.
Added details of hsl/hsla color expressions to README.md.
Fixed some code formatting in NUIConverter.m
Swizzling didMoveToWindow instead of awakeFromNib so that programmatically created elements are styled
Added getVerticalAlignment:withClass to NUISettings
Added support for background-color to Label
Added support for a number of properties to TextField
Updated .nss files to improve programmatically-created TextFields' borders and alignments
Added programmatically-created controls to one of the demo app's controllers
Merge pull request #31 from brotchie/hsla

HSLA color expression support
Updated podspec to 0.2.2
Hiding only UIButtonTypeRoundedRect's background/border sublayers 
Added TabBarItem style class, moved relevant TabBar properties to it
Added support for TabBarItem background-image-selected
Added getControlContentHorizontalAlignment to NUISettings, renamed getVerticalAlignment to getControlContentVerticalAlignment
Applied Button text-align to UIButton's contentHorizontalAlignment in addition to UIButton's titleLabel's textAlignment
Added selected state for UIButton
Merge pull request #38 from pinda/master

Added selected state for UIButton
Added Button background-image-selected and font-color-selected to README
Made miscellaneous README updates