Add NUMBA_WARNING_LEVEL to print messages about functions compiling to object mode
Merge github.com:numba/numba into warnings
Change to using warnings module and NUMBA_WARNINGS environment variable
Add special warning if there are lifted loops
Better handling of errors while retrieving function information
merge master
comment in config.py about values for NUMBA_WARNINGS
Merge pull request #677 from seibert/warnings

Add NUMBA_WARNING_LEVEL to print messages about functions compiling to object mode