Added build files for thrusty
Updated changes for version 0.3.23
Merged fit2tcx changes. Bugfix for invalid heartrate values
Speedup of id to file lookup by storing id's in map

Previously, every fit file was opened multiple times only to determine its id. Now this id is stored in a map for faster access.
Bugfix: Memory leak
Updated HISTORY info for release of 0.3.25
Updated official garmin communicator plugin version number to 4.2.0.0