Missing:
-Certificate validation and so on required?
-just send request.xml? or use GET or something?
-undefined symbol error when trying to load plugin

2 Bugfixes:
-correct initialization of PDUSensors with new()
-cooldown value for XML-file refresh is now correctly converted from MS to NS

Remaining TODOs:
network logic to obtain XML-file
use appropriate lock when sensor accesses PDUUnit
make reading XML more generic?
Test it!

Every sensor stores its full MQTT-topic now

Add possiblity to specifiy plugins in the global.conf
Rename plugins to libdcdbplugin_pluginName.so
Add version number to plugin-names

Remove readme.txt from perfevent

Add possibility to compile with symbol DEBUG (use "make debug")
Minor fixes and improvements to debug-output

Add missing -rdynamic flag to the linking of dcdbpusher
Fix double-free error when destructing a Template-Sensor

Finished rework of sysfs-files.
Adapted and improved various other involved classes.
TODOs remaining:
-adapting Makefile for automated compilation of librarys
-solving runtime errors when trying to run dcdbpusher with sysfs

Removed no longer required files from SYSFSSensor
Renamed SYSFS to Sysfs
Introduce Configurator-base class, derive SysfsConfigurator from base-class