Tohil

* Expose the tcl interpreter in a Python module.
* Allow importing libtclpy in a parent Python interpreter.
* Added 'tclpy.eval' command for Python.
* Updated to Python 3

* Use tcl stubs for forwards compatibility of tcl versions
* C extensions should work properly
* None, True and False are converted to sane tcl values
* Allow null bytes returned in python strings
* Define unicode behaviour
* Python sequences are converted to tcl lists
* Python mapping objects are converted to tcl dicts
* Python number objects are now supported explicitly

* Added 'py import' command
* Added 'py call' command
* Handle exceptions in a sane way
* Remove autotools

* Initial release with 'py eval' command