Purged web stuff that really does not belong in a library repo

It's a bit of a shame that such an useful library should share the repo with web-stuff that is completely optional - I fainted for a minute when I looked at requirements.txt :smile_cat: 

Any chance that you could move the web interface to its own repo, and keep the library separate? 

I also note that there is no licensing information on posical.py, nor it is mentioned in Readme. Any chance you could fix that? If you are not bothered with limiting reuse, the BSD license is a good default ( http://opensource.org/licenses/BSD-2-Clause ).