add nuget building + version update in build
Merge branch '1.x' into 2.x

Conflicts:
	dist/jquery.inputmask.js
	dist/jquery.inputmask.min.js
	dist/min/jquery.inputmask.js
	js/jquery.inputmask.date.extensions.js
	js/jquery.inputmask.extensions.js
	js/jquery.inputmask.js
	js/jquery.inputmask.numeric.extensions.js
	nuget/jquery.inputmask.nuspec
Update build props