Remove oboe_fu artifacts.
Updated SWIG from tracelytics/oboe#206
Change keyname to RubyHeroku.Oboe.Version
Include constants and accessors for bit masks
Extract sample_rate and sample_source when available
Report liboboe returned sample rate/source
Include more liboboe constants and change r to rv
On initialization, set all values manually
Remove test for a default sample_source - liboboe handles that.
Don't initialize sample_rate at all since it's not required in any case.
Tests to validate SampleSource on localset
Don't set sample rate/source manually.  Rely entirely on liboboe.
Only report SampleRate/Source when tracing_mode == always
Remove duplicate gems to fix Ruby 1.8.7 warning:
Your Gemfile lists the gem rake (>= 0) more than once.
You should probably keep only one of them.
While it's not a problem now, it could cause errors if you change the
version of just one of them later.
Re-enable Cassandra per:
https://github.com/travis-ci/travis-ci/issues/1650
Downgrade Rubygems per: https://github.com/bundler/bundler/issues/2784
Merge pull request #276 from tracelytics/issue_276

Remove oboe_fu artifacts
Merge pull request #285 from tracelytics/issue_285

Change OboeHeroku __Init Key
Merge pull request #282 from tracelytics/issue_282

Report SampleRate & SampleSource per updated SWIG API
Merge pull request #13 from appneta/net_http_tests_fix

Remove SSL connection requirement from Net::HTTP tests