QEMU 4.0.1 re-base with advanced plugin API

Re-based from QEMU 4.0.1 with advanced C and Python APIs for Dynamic Binary Instrumentation. Plugins for this release include HTTP dataflow, instruction traces, AFL-like fuzzer, Triton symbolic execution, and a Qt GUI. Rapid Analysis features a job system accessible from both C/Python plugins and TCP connections with full system loads in the tens of milliseconds.