added complex functions to npymath
fix previous merge
small refactor in scalar tests.
added check for PyError_Occurred to fix issue #539
Merge branch 'master' into abs_fix
added test for issue #539 fix
In the test, added a fix for Python 2.6 which throws a TypeError rather than an
OverflowError.
Changed Python version test
added missing colon on if
moved test to test_conversion.py
added import sys to test_conversion, removed it from test_dispatcher
Merge remote-tracking branch 'origin/master' into npymath-complex
removed unneeded import in typeinfer
prefer relative imports
return None in numpy_letter_types_to_numba_types on unsupported types

more convenient than raising an error.
moved error check on args to for loop
Merge branch 'master' into abs_fix
numpy ufunc type inference now fails for unsupported types

Also made a bit more uniform test_ufuncs.
Experimental patch for explicit variable disposal in the IR.
(tests pass!)
Merge branch 'master' of github.com:numba/numba into var_lifetime