Add scm version 3.1.0 version test
Add ability to parse scm 3.1.0 accept output

Patched on 0.3 release versioned 0.3.1-SNAPSHOT
Also updated name of some variables to more accurately reflect their scm
version requirement. Added initial research on parsing JSON output of
3.1.0 commands, but ran out of time. Included the output txt file if
anyone has time to hack it in.
Add experimental JSON support for accept.

The JSON support here is meant as an example for future development. I
don't think the Jazz JSON API is stable enough to rely on at this point,
so all we're providing here is a basic HOWTO. In particular, the UUID
doesn't map to one of the (1001) style descriptive numbers anywhere and
the scm compare command doesn't provide the UUID for the changeset in
its JSON output. Neat, huh?
Merging in changes from https://github.com/ccosby/rtc-plugin.git