Refactor patteren handling in set_match
Escape /s in set_match
Factor set_{1,2,3}match out of set_match
Push down cased_regex call site
Refactor used_{1,2,3}match into a dictionary
Lazy define s:matches
Carry matches locally on each window rather than once in script
README: tweak usage screenshot caption
README: breakout note about preventing default mappings
README: rework basic usage section
Bump version to 0.9.2