Added EEG data import from EDF (European Data Format) files.

Added a setting under Tools -> Options to replay logs with audio visualizations.
Added audio visualizations when replaying logs containing data from the following channels: NeuroSky ThinkGear EEG, OpenEEG, Pranayama and Halovision.
Added key bindings to fast forward, rewind, and pause when replaying logs using the arrow keys and the space bar.
Added option to replay Halovision graphs with audio visualizations.