v3.1.0

Changes:

Fixes:

• #389 top orientation not accurate
• #476 Always fire dp.change event when value changes from invalid state

Enchancements:

• #130 thanks @csnauwaert a new option calendarWeeks now allows showing weeknumbers in day view
• updated 24hour detection to look for hh/HH besides a if format string thanks @caponica
• Added grunt task to build nuget package