* fix typos (thanks Rajesh)
* move log related data out from event API specification
* change callable key in definition to callback
* use event data in observers instead of cached records if possible
* event level is now a number 1…100
* improved event safety checks
* add event name and description method
* new can_view() method
* improve unit tests to test all callable types
* improved performance
* handlers can be defined as internal or external
* external handlers are not called instantly when inside DB transaction
* code cleanup
* more robust detection of broken handlers
* refixed unit tests
* removing all pending events from 1.9 - these can not be processed due to encoding changes
* finally using real 'component' in handlers table