Add safety to ensure to never start traces in 'through' mode
A better sample? method with improved string validation
Add method to correctly convert an arbitrary variable to a label'
Use the prettify method to assure clean profile names
Prettify profile_method arguments.
Merge pull request #295 from tracelytics/issue_295

Profiling seems to report function ID rather than name
Merge pull request #294 from tracelytics/issue_294

Unexpected traces in Rack layer
Merge branch 'master' into issue_8

Conflicts:
	lib/oboe/util.rb