Work on math type functions
Allow adding metadata to AST nodes
Use typing functions for math type inference
Improve support for {pow,math.pow,np.power}
Organize imports better to avoid some cirularity problems
Work on better way to type infer and lower math calls
Remove some leftover code
Fix LLVM module in pipeline (make closures work)
Fix reference to signature processing for closures (@jit(...))
Fix changed signature of signature processing function
Add test for issue #126
Reintroduce qualified_name and mangled_name in pipeline and fix closures
Track closure status in pipeline
Merge error messages from inner functions into outer function error env
Update closures for new error reporting
Fix error reporting when source is unavailable (Issue #128)
Fix bulitin abs() in nopython mode (Issue #126)
Add flags to extension type method compilation
Allow flags in extension class compilation (Issue #122)
Add tests for unsigned arithmetic