remove argument logs
allow for phantomjs tests
ignore the whole build folder
pointercancel is an implicit release of pointer capturing
Add grunt tasks for building
grunt is now the only builder, load files in order for minifier
Allow for a user to use dispatcher.registerTarget(document)
Pressure must be 0.5 in button down state if no hardware supplied pressure
Merge pull request #30 from azakus/master

Various Fixes