Better support for nested functions
Adding "Deeply nested function" test
Changing test generators to access globals
Using some descriptor magic to enable inversion of methods
Detect that it is impossible to convert multiple input generator
Converting ".next()" calls to yield statements
Can use both for loops and .next() calls in single generator
Converting StopIteration handling to GeneratorExit handling.
Using sets instead of lists for getting function args
Bumping version and updating readme