Experimental Python 3 support
Update README.md
Python 3 support, code optimizations
New way to record URLs using priority heap, reduced number of regexes, improved valid links finding speed, normalized docstrings and comments. Known bugs with infinite looping through one link and duplicated parsing.
Test file added; Experimental precrawl and postcrawl functions added; Links cleaning; More comments %)
Updated README.md
Merging testing and master branches.