Added fit parsing module
Merge branch 'master' into feature-fit_import
Moved .tcx / .fit parsing to separate classes
.fit file import is working, frontend shows stance_time / vertical oscillation if present
Fixed hiding of graphs without data
Removed old code for file import
Removed javascript debug output
Merge branch 'feature-fit_import'
Additional activity detail entries dynamically rendered in details view when data are received from ajax call
Minor javascript code cleanup