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

Deleted test.c as it was just a reminder-file.
Add readme.txt as kind of (incomplete) documentation
Various TODOs remain. Also some polishing could be required.

Most of the code is copied from sysfspusher and adapted to match perfpusher
TODO: think of a suitable config-file-layout
TODO: insert new code to read perf-counters