update smoke_test.sh for bootstrap default
update the MarkdwonString rich type so that it can use rdiscout, kramdown or maruku instead of bluecloth.
update smoke_test.sh for latest version of RVM
add clean theme to smoke test
update Gemfiles for unit tests for compatibility with JRuby
the latest versions of JRuby seem to have a messed up standard input; work around
another JRuby robustification
markdown test robustification
the working directory for rails -m in the latest versions of JRuby is messed up.
smoke test: don't use standard input to thor because it doesn't work in JRuby
integration test robustification.   Now tests against:

- jruby 1.7.2
- ruby 1.8.7-p378
- ruby 1.9.3-p374