shakers~ improvements

[isabelgk]

Fix building/linking issues

Use attributes for energy, decay, numobjects, resfreq, and type.

Fix noteon messages. It seems like the noteon message's frequency is changing which type is playing. So playing a C4 plays a maraca and a D4 plays a cabasa, or something along those lines. I suspect fixing the message parsing and using attributes will help fix this...

[isabelgk]

Instead of changing noteon functionality (a breaking change), consider creating a new message play which takes an instrument and amplitude which will have the correct functionality (according to the STK noteon function, the help patch, and my own intuition)