Oscillator performance problems

[jussi-kalliokoski]

The generate function takes most processor usage of all the audiolib.js functionality. This should be fixed, as it's a fairly used feature.

What should be done:

• Remove the fm arguments from generate() [ also to comply with the new spec ]. Move these into a single .fm property.
• Move to using wave shape names instead of meaningless numbers. To prevent from breaking the backwards compatibility, preserve the old syntax as well.
• Create a way of creating custom combination wave shapes to the prototype, to reduce the amount of redundant oscillators needed in the code.
• Create a performance test for Oscillator.

[jussi-kalliokoski]

Needs review.

[jussi-kalliokoski]

Confirmed to have improved vastly, closing.