Propose new definition of IndependentType

[mwvoss]

If Issue #17 is accepted, I'd propose to change the definition of IndependentType to refer to where the training happened as:

Instead of this:

"IndependentType": [
"Activity",
"Biomarker",
"NA",
"Physiological",
"Volume"
],

Code as something like this:

"IndependentType": [
"Home",
"Gym",
"Lab",
"Hybrid",
],