added a 'getAttribute()' feature test to catch browsers failing correct boolean attribute handling, avoids using the native DOM API in IE8 and others failing, added forgotten beta state in the code version variable
added a 'getAttribute()' feature test to catch browsers failing correct boolean attribute handling, avoids using the native DOM API in IE8 and others failing, added forgotten beta state in the code version variable

dperini/nwmatcher,dperini/nwmatcher,dperini/nwmatcher