Upgraded audible feedback, minor bugfixes, filename consolidation

Changelog version 0.1.7

Audible feedback

• specific sound files for different actions added

Renamed files

• (un)install script files renamed
• trace script file renamed
• log file renamed and relocated

Bugfixes:

• axes inverted for yaw vr virtual tracker
• fixed scale of cache memory time
• thread safety for cache functionality improved

Miscellaneous

• added changelog to installation zip-file