8/7/2009    Changed path to pixelmap in ProcessIO.h to stay within repository
    	    Removed unused makefiles
	    Moved config file to config directory of repository
	    Removed writing of config file
	    Removed several unused functions
	    Removed command to switch off logging
9/7/2009    Implemented readline library for command-line editing
    	    Included logging functions in main class (solved lockfile problem)
	    Only a single log file is written
10/7/2009   Removed reference voltage related code (not supported by hardware)   
17/7/2009   Communication with FDTI now with Linux kernel driver (virtual com
    	    port) instead of FTDI library (Standard open()/read()/write()
	    system calls can be used).
20/7/2009   Reading with time-out from tty uses now select()
22/7/2009   Combined code of 'hv' and 'hvdiff' commands. With either one, pixel id,
    	    channel number of keyword 'all' can be used. Removed configuration
	    option to set usage of DAC values. Instead, a third parameter 'dac'
	    to the 'hv' and 'hvdiff' commands chooses DAC values.
24/7/2009   Lockfile is deleted if configuration file cannot be read
27/7/2009   Slow data is written for every HV ramp to file given in configuration
29/7/2009   Fixed bug with loading HV settings. No error is produced on negative
    	    DAC values (the value is set to zero).