give glob a default option block.
log when we detect cs.
"attach" elements should be merged in before "after" elements.
add "always" tasks (always: true).
move to .plz/state
remove Q voodoo that's not needed anymore.
move activateWatches() to task. use sets for tracking finished tasks. and post only "filenames" into context.
load defaults from plz-builtins.