Fixes -Wreorder warning

Issue: #32
Builds all graph* and parsed* code into a separate libstapi

Issue: #32
Add stub for tests

Issue: #32
Adds test for TSmalltalkInstruction

Issue: #32
Adds tests for InstructionDecoder

Issue: #32
Adds tests for ControlGraph

Issue: #32
Adds tests for ABAB (#2)

Issue: #32
Adds tests for stack semantics

Issue: #32
Adds test pattern for parsing bytecode

Issue: #32