remove dead elif in typeof_expr()
Developer documentation for adding type inference information
remove unneeded top table of contents in "extending frontend" doc
document template registry
change builtin_intrinsic to builtin in dev docs to match actual Numba usage
Merge branch 'master' of github.com:numba/numba into dev_docs
address review suggestions
Add an as_dtype() function and use it in numba_types_to_numpy_letter_types()
WIP - claim datetime64 and timedelta64 are support - they fail at lowering
Add cautionary comments
Merge branch 'master' of github.com:numba/numba into npdatetime_array
Merge branch 'master' of github.com:numba/numba into npdatetime_array

Conflicts:
	numba/tests/test_numpy_support.py
Merge branch 'npymath-complex' of github.com:numba/numba into npdatetime_array

Conflicts:
	numba/numpy_support.py
Add more definitions for additions, and add a missing "raise" statement
Add definitions for subtraction, and raise NotImplementedError on the wrong output unit
put type registry first in task list
Make record dtype usable:
- expose from_dtype to numba namespace
- fix record setattr (coercion bug)
Merge branch 'master' of github.com:numba/numba into npdatetime_array

Conflicts:
	numba/numpy_support.py
	numba/targets/npyimpl.py
	numba/targets/ufunc_db.py
Cleanup dead imports
Enhance ufunc tests, add implementations of npdatetime ufuncs