Bugfixes and refactorings.

Merge branch 'release/v0.1.2'

This release cleans up the lithe core codebase. Some notable changes:
* fixes failing tests where the patch disconnect was occuring when there
were no connections.
* removes testParameterField, and testSink (these were not written, or
were no longer relevant).
* removes sorter parameters from the Node class to adhere to single
responsibility principle.
* refactored sorter to work with the new refactors in Node class.

Remaining issue:
* testToricAtlas still fails. Need to look into the math to ensure that
things are working correctly.

Proof of concept

This release marks the proof of concept version of Lithe. This features:

• A working implementation of an object-based audio graph.
• A working definition of an audio object signal

Further, this is the version tested in a 20.1 channel sound installation HIVE at SBCAST, Santa Barbara in December 2016.

Author: Akshay Cadambi