Add headers for maths types because I'm an idiot.
Add " quotes for includes as well.
Remove ARC from C flags.
Fix cxx_bin tup macro.
Add snow-common.hh

This is mostly a holdover from snow-palm and other iterations of the
code.
Replace namespace snow {} with BEGIN/END_SNOW_NS
Fix some warnings in triple_buffer_t.
Add data module to Tuprules.
Add Sparse parser implementation.