added doxygen configuration
enahncements in building documentation
bugfix in doxygen configuration to extract information out of C-files, too
Merge branch 'master' into major_rework
Better documentation of function "crutilsd_set_verbose_level" in crutilsd and enhancements in this function
 * moved source for setting logging options into own source-files in own directory (log instead of config)
 * enhancements in cmd-options parser
 * renaming of some configuration options
splitted set_loglevel() into set_loglevel() and inc_loglevel()
Renamed parse_cmd to read_cmd_options
* disabled option flags for socket- and driver-path (should be set in config file)
* renamed option flag "foreground" to "daemonize"
moved and renamed config functions
added assert-checks in conf_parse_argv
added functions to open and close the configuration file
restructured basic config in crutilsd
added cmakemodule to find libconfig
* bugfixes in FindLibconfig.cmake
* usage of FindLibconfig.cmake in crutilsd
Merge branch 'crutilsd_config_3' into major_rework
Merge branch 'major_rework' into crutilsd_driver_1

Conflicts:
	src/crutilsd/CMakeLists.txt