Fix issue 13

Created originally on Bitbucket by PierreBlancfat (Pierre Blanc-fatin)

Was already merged in Bitbucket before import, marked as merged by the import user

+ 2 test files

I renamed get_boosted_dict function in get_decorated_dict for consistency.

I had to add or alias.name == "jit" on __init__.py line 105 to make the fix works.