Added directivity classes, updated docs, updated imports
Fix documentation
Fix missing comma's in setup.py
Moved all tests to unittest folder.
Converted room package to a module.
Merge dsp.py with signal.py
Remove init from unittest folder causing problems loading stdlib unittest module.
Fix order of import statements
Merge pull request #1 from FRidh/dev

Merged several files.
Change to absolute imports
from __future__ import division
PEP8
Merge pull request #2 from felipeacsi/absolute_import

Absolute import
mayavi is now optional
Merge pull request #4 from FRidh/dev

mayavi is now optional
Docstrings updates
Merge pull request #5 from FRidh/dev

Docstrings updates