Fix issue with signature verification in JRuby

[sporkmonger]

There's a weird discrepancy between how signatures are verified in JRuby and in all other Rubies. I've worked around this issue by adding a begin..rescue block to catch the extra exception that JRuby throws in some scenarios.

Also updates the version number for release.

Any chance this could get pulled and released soonish? This error is wreaking havoc on our continuous build. :-/

[sporkmonger]

Tests are all passing.

[sporkmonger]

Looked like there was a conflict, so I resolved it and fixed the tests that started failing from the other merge.

[progrium]

This is great, thanks. You beat me to it all.

[sporkmonger]

BTW, since I added a .travis.yml, could you set up the Travis web hook for the repo? You may also want to add a notification block like this:

notifications:
  email:
    recipients:
      - jeff.lindsay@twilio.com
    on_success: change
    on_failure: change