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Enhancements:
* PR 73: Add get_process_triple() and get_host_cpu_features()
* Switch from LLVM 3.6 to LLVM 3.7. The generated IR for some memory
operations has changed.
* Improved performance of IR serialization.
* Issue 116: improve error message when the operands of a binop have
differing types.
* PR 113: Let Type.get_abi_{size,alignment} not choke on identified types.
* PR 112: Support non-alphanumeric characters in type names.
Fixes:
* Remove the libcurses dependency on Linux.