Add little benchmarking script

Hey, things are not as worse as expected! At least standard
decorator.decorator is just as bad as black_magic.decorator.flatorator!

On the other hand, functools.wraps is multitudes (factor 500-800) faster
than black_magic.decorator.partial :(
Add profiling branch for BlackMagicDecorator
Move benchmarks to subfolder
Split benchmark for partial/decorator into separate files
Force absolute imports
Merge branch 'benchmark'
Bump version 0.0.9