Major refactoring.
Minor changes
New utility funcs (check_nan, check_strict_monotonicicty)
updated ignore of binaries in tests/
Continued refactoring
New signature in header and pxd. Added  to cython declarations.
Progress on refactoring of code generation
About to pull in updated newton_interval
Merge commit '00f77dcd669edc2190ac8b34fb172189b4970d62' into refactor2
New upstream version of newton_interval
About to pull new version of newton_interval
Merge commit '87105371c25e61c37984ed47e425f39a2f0223b4' into refactor2
nogil in pdx
fixes, still incorrect algebra
Compiles but numerically incorrect
Almost functional. Extrapolation not working
New version 0.3, 3e5 x speedup over scipy.
Updated requirements for v0.3