Added tag v0-15 for changeset 6e62028c7b52
Added match_empty()
Added tag v0-14 for changeset 81261abbb1a5
Changed from using options to quad_states
Added tag v0-13 for changeset 4e41659e80b7
Added functions for boundary cascades
Added tag v0-12 for changeset bd22423bcbae
Added functions for boundary checks
Added tag v0-11 for changeset cf19c320d005
Updated README
Start split of string_matchers from string_extras