Pts v0.6.0

New features

• Experimental UI module for creating buttons and drag-drops. See demo here.
• Add Circle.fromTriangle function (Thanks @AndGem for the suggestion)
• es2015 build by @bsouthga

Bug fixes

• Various bug fixes and docs improvements by our contributors ( @ichabodcole , @amilajack , @bnjm , @thewarpaint )
• Fix documentation scrolling issue
• Improve readability for exported html in demo editor
• Other minor fixes and improvements