Biokit

* BUG FIXES: cleanup MANIFEST

* BUG FIXES:

* a py3 typo.
* fixing complexes module
* remove useless db package

* NEWS

* add taxonomy module.
* add goid module.
* Fixed bunch of Python3 issues. most important in rtools packages
to use Popen instead of popen4 and manipulate bytes vs strings.
* All tests passes under Python2.7 and Python3.4

* CHANGES

* viz package:

* refactored most of the functions/classes to be have more
consistent input data for the constructor and more consistent
parameters for the plot() methods.
* Hist2d is now called Hist2D

* BUG FIXES

* NEWS

* add new module in viz package: hinton, core (to factorise code)
* add new notebooks related to the viz package.