Cleaning up Score.Meta
Make 'Reactive' transform 'Typeable'
Adds Transformable attributes
Refactored Meta-API
Renames runMetaReactive
Temporarily disabling part specific meta-events
Cleaning
Cleaning
Moves addMetaReactive etc to 'Combinators'

This will be needed in the merge of the timetypes branch
Merge branch 'master' into timetypes

Conflicts:
	src/Music/Score/Combinators.hs
	src/Music/Score/Meta.hs
	src/Music/Score/Meta/Annotations.hs
	src/Music/Score/Score.hs