Rip out all 1.8 identifier management machinery
Update high-level interface for new identifier semantics
Merge branch 'master' into identifiers
Add simpler registry for HDF5 1.8
Add locking implementation to _objects
Add explicit locking to entire low-level API
Remove locking in defs.pyx
Remove special case for FileID objects
re-enable debugging for ID dealloc
Update locking, registry
Add debugging function
Add explicit locking to the high-level API
Relax locking for iteration
At HL, only close IDs directly related to the current file
Merge master into identifiers branch
Improve documentation in _objects.pyx
Remove decorator which confused 2to3
Merge pull request #454 from andrewcollette/identifiers

Merge "identifiers" branch