[CMB-1238]Added 'Selected+Focus' state to IconButton
Cleanup of IconButton.less, and Button.less

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Included image-based pressed+spotlight support.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Fixed buttons on neutral background and spotlight+pressed contextual-popup-button.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
[CMB-1238]Added 'Selected+Focus' state to IconButton
Cleanup of IconButton.less, and Button.less

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Included image-based pressed+spotlight support.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Fixed buttons on neutral background and spotlight+pressed contextual-popup-button.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge branch 'CMB-1238-rakesh25' of https://github.com/enyojs/moonstone into CMB-1238-rakesh25

Conflicts:
	css/Button.less
Merge pull request #1529 from enyojs/CMB-1238-rakesh25

[CMB-1238]Added 'Selected+Focus' state to IconButton