13/8/2010	Control program for new G-APD bias supply started, using previous
			program 'hvcontrol' (revision 9852).
20/8/2010	Removed the possibility to set DAC values.
17/11/2010	Added possibility for bulk transfers (ReadAll(), SetChannels())
24/11/2010	Ramping for many channels possible with bulk transfers
7/12/2010	Added dynamic mode
6/1/2011	RampVoltages() had infinite loop if crate communication stopped
19/1/2011	'hv' command crashed when no bias board was present
28/1/2011	Replaced 'hv' by 'channel' and 'pixel' commands (with new pixel
			names, the name is a number itself)
11/2/2011	Removed Lockfile (DIM will prevent starting two instances)
			Added 'crate' command. Changed signaling of program exit.
3/6/2011	Fixed bug in channel addressing from board numbers above 7.
28/6/2011	Adapted for compilation under ubuntu
12/7/2011	Default voltages implemented for pixel command.
4/8/2011	'pixel' and 'channel' commands accept 'info' parameter.
5/8/2011	Default voltages now given per bias channel, not per pixel
15/8/2011	Added global voltage limit and minimum time between system resets.
24/8/2011	Ramping also for decreasing voltages.
26/8/2011	Removed support for multiple crates. Crate name can be given as
			command line argument.
30/8/2011	Added basic calibration for current measurement.