expose default handle widths
Merge pull request #30 from detroit-labs/expose-default-handle-widths

expose default handle widths
Added support for custom alignment insets for thumb images with rendering the track images.
Updated alignment insets for metal theme thumb images
Added podspec to project file
Updated podspec to v1.2.0
Merge branch 'master' of https://github.com/muZZkat/NMRangeSlider
Added support for custom upper/lower touch edge insets for thumb images. Default is 5px.
Fix in podspec, Bump to v1.2.1
Merge remote-tracking branch 'upstream/master'

Conflicts:
	NMRangeSlider.podspec