[incremental search] isearch highlight cleanup
[occur] starting with simple occur functionality
[occur] command cleanup
[occur] highlighting occur doc
[occur] fixing occur lines
[occur] make occur doc react to keyboard evts / highlight it
oop.mixin returns object
[occur] options fix
[occur] entering and exiting occur: position is translated
[occur] cleanup
fix for setReadOnly
[occur] allowing other commands
[occur] highlighting occur search term in occur mode
[occur] towards better occur session display
[occur] proper session replacement
[occur] fixing recursive occurs
[occur] keep highlights when exiting recursive occur session
[occur] removing debug code
fix formatstrings
fix tests