Code cleanup for the browser.
Cleanups for the node graph code.
Started code cleanup for the parameters editor.
Finished code cleanup for the parameters editor.
Finished cleanup for the /buttleofx/gui/ folder.
Some additional (minor) cleanups.
Some cleanups based off data from flake.
PEP8 cleanups for python, and a bunch of smaller changes for the QML files.
Merge branch 'develop' into cleanup, and fixed conflicts.

Conflicts:
	buttleofx/data/buttleData.py
	buttleofx/gui/graph/qml/Graph.qml
	buttleofx/gui/viewer/qml/TimelineTools.qml
Cleanup for the buttleofx/core/ folder.
Cleanup for the buttleofx/data/ and buttleofx/event/ folders.
Cleanup for the buttleofx/manager/ directory.
Finished cleanup for the /buttleofx/ folder.
Merge pull request #115 from JamesWrigley/cleanup

Code cleanup (part 2)
fix some flake 8 warnings
add flake8 configuration file