Core functionality container issue

[toshipiazza]

Core functionality is not yet completed. Urgent:

• [ ] Finish implementing all non-SIMD instructions
• [x] Add getters and setters for register/memory taint under drtaint_ namespace
• [ ] Return opaque drtaint object so we can implement multiple taint mappings
• [ ] Tests for many different instruction classes
• [x] Taint visualizer for nudge event, for debugging

[toshipiazza]

An aside to returning an opaque drtaint handle--does Umbra even handle multiple mappings? afaik it uses a single static page table on 32-bit, so I'd be surprised if it supported multiple memory mappings at all.