Fix include path for numpy_compat.h following change in compyte.
Merge pull request #1695 from abergeron/fix_npcompat

Fix include path for numpy_compat.h following change in compyte.
Do not use arrays as conditions, explicitly test against None
Merge pull request #1696 from lamblin/fix_scan_valueerror

Do not use arrays as conditions, explicitly test against None
Minor typo fixes in doc
Typo fixes in doc