NNetSimu 2.7

Version 2.7 of NNetSimu of NNetSimu was released on mmm dd yyyy.

New features:
 * Store dynamic model state
 * Visualize EEG sensor data points (for debugging only)
 * Status of arrows on/off stored in user preferences

Bugs fixed:
 * Undo command could cause crash of application
 * Wrong position of signal maximum in measurement mode

Previous version: NNetSimu 2.6

Succeeding version: NNetSimu 2.8 (not yet released)