Update external_libraries/oscpp
Pass engine options as OSC packet
Add abstraction for engine options
Add contains method to ResourceMap
Start shake in the correct directory from Xcode
Make audio input and output buffer arrays const in driver process method
Whitespace fix
Fix library search path for release configuration
Fix assertion
Hack for getting Xcode to relink against changed libmethcla.a
Refactor source tree combinators
Implement simple multitouch additive synth
Remove debug print
Read toolchain commands from environment

In order to support tools like clang's static analyzer.
Add strict aliasing warning
Use list syntax instead of flag function
Add experimental vectorization flags
Rework command interface and use PIMPL for Environment

Rework message queue and command interface, allocating commands on the heap
instead of the stack.

Split (some of) Environment's implementation details into a separate class that
is implemented only in the source file. This should untangle dependencies and
reduce compilation times.
Remove some debug prints
Store pointer to path in LoadMessage