Add install instructions to README
Allow the use of a Proc to decide if the middleware is enabled
Merge pull request #16 from camilo/use_proc_when_enabling

Allow the use of a Proc to decide if the middleware is enabled
Merge pull request #17 from schneems/patch-1

Add install instructions to README
Fix a typo in middleware.rb
Merge pull request #24 from nono/patch-1

Fix a typo in middleware.rb
Move + into public methods
Merge pull request #26 from quirkey/plus_public

Move + into public methods
Support interval for :object mode
Add object interval test
Merge pull request #28 from csfrancis/support_new_object_sampling

Support new object sampling
Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/stackprof/middleware.rb
	test/test_middleware.rb