Rename Methcla::EngineOptions::operator<< to addLibrary
Add numSamples method to MultiChannelBuffer
Avoid calling std::min unnecessarily
Add interleave template that scales the input before storing
Update stir
Add a note about git submodules
Add support for setting a log handler in Methcla::EngineOptions
Allow creating an engine with platform specific driver

This is necessary on some platforms where creating the driver
requires runtime dependent context that needs to be passed from
outside.
Fix compilation errors and allow passing log handler and audio driver
Update stir
Add audio driver implementation and example for PNaCl/Pepper
Copy plugin headers from pro branch

For ease of compilation of example projects, API headers should be
present in all branches.
Import sampler example from external repository
Add webserver script

Installs warp-static if required and launches warp.
Reorganize comments
Use cabal-dev instead of cabal sandbox