moved python module to subdir
nicer output
fixed bug in method iter()

Output wasn't created correctly - output at given positon is a sum of
output from all nodes connect by fail-edges.
function to export trie/automaton to graphviz
C module: fixed bug in method iter()

Output wasn't created correctly - output at given positon is a sum of
output from all nodes connect by fail-edges.
better tests for stats
fixed possible segfault if mem allocation failed
+major change
docstrings, removed unsed start/end options
added unittest for python implementation, fixed __len__ method
use dequeue instead of python list

Solution provided by Bruce Harold (bharold at esri.com)
Merge pull request #1 from WojciechMula/master

latest from Wojciech