VoIPBandwidthCalculator v1.2

Release v1.2

Update settings for G.728 codec according to: ITU-T Recommendations: G series.
Replace old menu bar with new one with better style.

Other minor changes.

VoIPBandwidthCalculator v1.1

Release VoIPBandwidthCalculator v1.1
Basic functionality to calculate bandwith for network with VoIP.