Refactored the representation of read/write sets. The class RWSet.AccessInfo is a tuple that contains information for the dependency (see docs/project1.txt). Fixes #2.
Merge branch 'master' of https://github.com/rcaa/rwset
Merge branch 'master' of https://github.com/rcaa/rwset
Merge branch 'master' of https://github.com/rcaa/rwset
Adding missing (indirect) dependencies from issue #11.

Fixed #11.
Added a toString method to class AccessInfo