First import of TrigHTTInput into master
Related to EFTRACK-8:
- first import TrigHTTInput, which contains tools to read/write wrappers and HTT files
- some cleanup in TrigHTTObjects and TrigHTTMaps to allow usage of classes
- c-tests are commented since we are waiting for CVMFS installation of map files
Replacing !52048 (closed), which failed merging in unreproducible way. tagging @jahreda and @tbold