Added ADL xAPI wrapper submodule
Added dummy module ready to fill with xapi stuff
Skeleton integration of module with scene
Added placeholders for wrapper functionality
Simplified boilerplate
More cleanup
Merge branch 'development' into 'xapi-kit'

Conflicts:
	support/client/lib/index.html
Fixed scoping issues
Continued experimentation, updated XAPIWrapper
Added automatic pivotal tracking of branch

[#56896806]
cleanup
remove debugger statement.
Fixed params typo, added single-client xhr propagation

[#56896806]
Rearranged xhr callback

[#56896806]
Fixed number of arguments for each method

[#56896806]
Fixed linux compatibility issue with the datafile API

[#56896806]
compress json
add compression of JSON messages
Cannot post statements from system-generated events

[#56896806]
fixed hookups for behaviors. Hookup to parent properties and methods was overwriting behavior properties