• add EQCSS.reset() function to reset up EQCSS.data and the DOM from the tags and attributes EQCSS generates when it runs (you can reload EQCSS any time after running EQCSS.reset() by running EQCSS.load())

This helps issue #64

• switch mousedown event listener to only trigger on left mouse button clicks to recalculate EQCSS on left click drag. (Previous to version 1.6.0, EQCSS would trigger for all mousemove events between mousedown and mouseup for mouse clicks of all buttons)

• performance improvements:

• • replace == with === and != with !==
• • replace querySelectorAll() with getElementsByTagName()
• • replace getAttribute('rel') & getAttribute('type') with rel & type