Much expanded architecture documentation
Merge branch 'master' of git://github.com/numba/numba into dev_docs
syntax highlighting for LLVM IR
Fix typos found in review, expand stage 1 and 5 to show more Numba debug flags
More suggestions from @pitrou: remove TOC, unneed x86 assembly, add his contributing document
Merge pull request #665 from seibert/dev_docs

Developer Documentation: Contribution and Architecture