update URLs for issues and others
fix dates and license
fix magic lines
cleanup imports and module docstrings
use explicit imports
use consistent from __future__ in neo core
doc conf and examples pep8 cleanup
update documentation on documentation and other bits of documentation
Improve docstring for NeoMatlabIO
Missed a typo in previous commit
Merge pull request #102 from toddrjen/coredoc

Various cleanups to documentation