Add some tests from JikesRVM
Add Math test from JikesRVM
Add class loading tests from JikesRVM
Add some bytecode tests from JikesRVM
Add resolve tests from JikesRVM
Add other bytecode JikesRVM tests
Update number of passing tests
Merge pull request #439 from marco-c/add_jikesrvm_tests

Add some tests from JikesRVM
Introduce Native.simple; port some overrides to Override.simple
Replace Override.simple with Override.create, that supports returning long values and lets functions use the context. Fixes #379.
Support alternate impls that throw VM.Pause or VM.Yield
Test Class.forName with null string
Implement a helper similar to Override.create for natives; port some natives to use Native.create. Fixes #378.
Support returning doubles from alternate impls
restart thread immediately on Context.start
Convert other natives to Native.create
Port midp/codec.js natives to Native.create
Port midp/crypto.js natives to Native.create
Port midp/frameanimator.js to Native.create
Misc porting of natives to Native.create