testing dispose methods for all classes.

a few classes were not being disposed correctly and leaving some
garbage attached.
renamed Tone.Selector to Tone.Select
readded min...?

dunno what happened there.
refactored GT and LT to get rid of redundant code

Fixes #21
Modulus operator on incoming signal

the cost of the operation is proportional to the number of bits the
incoming signal has
rewrote bit crusher without ScriptProcessorNode

wow. and it works well.
MIDI to Tone.Note Node.js script
class tag on Tone
added setPreset to PolySynth
updated README
a little documentation on MidiToScore script
added detune parameter
changed effects on Dots example
new build
updated readme
example index styling
Merge branch 'master' into gh-pages