remove addition of mean in EMG filtering
Fix units in EMGs plotting and add normalization scale (% max) on envelope plots
add plot of normalized envelopes from all muscles together
Fix x label of envelope plots
Add .sto (OpenSim storage) file format for EMG output (set as default)
switch backslash to file separator for current platform
replace 'ls' with 'dir' command
Add .mot (SIMM and OpenSim motion) file format for EMG output
change elaboration.xsd to add output file formats
(preserving compatibility)
Merge branch 'MACcompatibility' into develop

Conflicts:
	src/DataProcessing/printEMGsto.m
move helper functions to 'private' folders
modify y axis scale setting of envelope plots
fix trial type identification
for filtering cutoff definition
move all readme.txt to README.md
move also src readme.txt to README.md
EMG output file format: set .mot as default
modify SetupFiles (update TestData from UNIPD)
modify Data Storage Structure: add dynamicElaborations folder
update CHANGES.txt (v2.1)
update README.md