Converted SimpleIntegerPicker to use font-based icons.
SimpleIntegerPicker now applies a "pressed" class to the buttons for that state.
Height of SimpleIntegerPicker is now able to be easily adjusted.
RTL arrows are flipped horizontally instead of rotated.
Switched the icon font characters to LESS variables so it's easier for other widgets to use use them.
Updated to use content changing instead of costly transforms.
Also, fixed a typo in the icon definition.
Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Add back support for assets, if they ever return.
Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge pull request #1118 from enyojs/ANG-528-blakestephens

ANG-528: SimpleIntegerPicker arrow buttons now follow design spec

Looks good!

Reviewed-by: Aaron Tam (aaron.tam@lge.com)