If debug is enabled when -E is given, print coverage debug
coverage usecase:tag improvements

Add support for exactly in tag.
Support specifying number of required tags in 'every' tag spec
Fix usecase tag evaluation

tag evaluation in usecase coverage shouldn't remember previous state
coverage usecase: Add missing set_left calls
coverage usecase: test for "exactly every 2" tags
Fix core dumping with certain use of perm coverage
Merge branch 'for-devel' of github.com:pablovirolainen/fMBT into for-devel
usecase coverage cleanup
Too eager to push
Doh... Still broken.
Merge tags support for usecase coverage
doc: documented tags in usecase coverage