Add hooks to trigger capture from plugins
Add plugin to trigger a capture in fixed intervals
Add plugin to trigger a capture from USB HID devices
Add hidtrigger to entry points
Fix small bug in hidtrigger
Merge branch 'triggerplug' into webplugin
Fix issue where trigger loops could not be terminated
chdkcamera: Stub out 'finish_capture' due to CHDK bug
hidtrigger: Add logging
web: Prepare capture when capture page opens; finish capture when it closes
web: Fix backbone mixin so it does not throw errors on simultaneous updates