Add help method to identify static assets
Pass the Rack::Request obj into collect
Add in static asset check in log_start
Add in MiniTest declaration to avoid nil bug
New test to validate that static assets don't get traced
New class method to follow MinitTest updates
rename to a more appropriate name
Add tests to validate tracing modes and sample_rate
rename to a more appropriate name
Set always/1e6 tm/sample rate defaults for test suite
Merge branch 'issue_31' into issue_8

Conflicts:
	test/instrumentation/rack_test.rb
	test/support/liboboe_settings_test.rb
Merge branch 'master' into issue_8

Conflicts:
	lib/oboe/util.rb
Merge pull request #8 from appneta/issue_8

Test suite doesn't validate tracing mode and sample rate