Merge tag 'v0.4.1' into develop

v0.4.1.
Bugfix: Default catch-all rule should be 'Ignore'.

Any other option makes no sense.
Updated documentation to refer to app config feature.
Allow JRuby tests to soft fail as they take too long.
Allow Travis-CI to push pre-release gems to RubyGems.
v0.4.2.
Merge branch 'release/v0.4.2'