Merge pull request #3 from ddiakopoulos/master

ADSR
Added noise node
Added clip node
parameterize min and max
Remove obsolete WTF build files
Updated autodrainedpool to ARC, from current WTF sources
Remove some cmake files
update libpd reference
Updated assertions, logging, and StdLibExtras to WebKit ToT
Removed memory instrumentation to follow WebKit ToT
Added sfxr node. Removed some obsolete files.
Added a lot of unit convenience functions to SfxrNode
Added a disconnect utility. Added a SupersawNode. Fixed const issue in GainNode.
Added missing pbxproj files