Error callback deprecated and unused
Fix up README
Update README
Typo
Good kludge
Cleanup
Deprecated append/prepend functions
Bump version in source
Bad spec
Dialyzer deprecation annotations
fix edoc
Return {ok,CAS::integer()} instead of ok for all store operations.

This saves a roundtrip when you set/add an item that you'll want to modify later.

This is a backward-incompatible change, but it seems important enough and seems to be
a coding oversight as most of the work was already done (but thrown away) in store_callback().

Conflicts:
	README.md
	src/cberl.erl