Merge branch 'sbt-0.10'

* sbt-0.10:
  Introduce README.md.
  Remove hardcoded sbt.version.
  Port to SBT 0.10.0.
collect parallel test runs

store current TestSuite in a DynamicVariable to allow for parallel test
execution
Merge remote-tracking branch 'rasch/master'
Generate an error result for suites that throw an error.

Currently, tests that throw an error don't generate a report.  Without
looking at the SBT log, it may not be obvious that there are failing
tests.  This captures the error as part of the report.
Merge pull request #3 from rossabaker/master

Report uncaught errors, parallel test support