"Error output of" was confusing to read

Replace with "stderr output of" to ensure that folks know there's not an error (same for "Output of" for consitency).

This was especially annoying when writing a wrapper around Hadoop components. They log everything to stderr, so I kept seeing "Error", even though everything was working fine.
Make pass on JRuby
Updated for next release
Try to figure out what's wrong on travis
Make tests run independently
Cleanup (give the spermy operators some wiggle room).
Merge pull request #57 from DevL/master

Adding some spaces for consistency.
Fix build
Try to figure out why rspec is broken on Travis only
Require rspect explicitly to get tests passing

I guess later versions of cucumber or aruba no longer require
rspec-core.  Methadone doesn't need it, but the tests
for rspec testing DO, so it's now added.
try not using ruby for external command

Thinking JRuby running this command might be an issue on Travis.
Bump version
Can create apps with dashes in their names

Closes #55
ignores
help switches are now documented

Closes #51
Improve option documenting-step and fix bug.

Seems I mis-understood what `\w` did in the regex and then never
documented an option with a less-than-three word.

This relaxes the requirement, but it seems a reasonable-enough compromise.

Closes #37
remove scare message that affects almost no one.

If you forget to install open4, you'll get a message when
it's required and that fails.  This seems better than
yelling at everyone that installs or upgrades this gem
add more rubies
document changes
don't need jruby given the other two