Fixed a bug in the importer, preventing direct "from" import of primi…

…tive values (missing local variable).

Added a check for the importer which fixes a Python 2 specific issue,…

… where import calls made from python code which was located within a PySON folder tree were broken.

 * Added an alternative "simpler" bunch type BaseBunch, supporting on…

…ly iteration and __repr__ as special features.

 * Made bunchMergedDeepCopy available on the pyson module level, to provide this feature for BaseBunch
 * Renamed namedPysonBunchRepr to namedBunchRepr
 * Consequentially refactored and improved the code a bit

(Tested in python 2.7 and 3.3 by using it in an application based on PySON.)

New Features:

* Parsing of strings/files/directory trees
* PysonBunch objects with "repr" to produce valid PySON strings
* Magical importer
* Updated doc
* Python 3.3 support

Added basic documentation.

Added licensing information.