rest-graph.gemspec: bump

example/rails: rename canvas name from 789 to can

rest-graph.gemspec: update for 1.2.1

README.rdoc, rest-graph.gemspec: rearrange and update gemspec

prepare 1.1.1 release

CHANGES: prepare 1.1.0 release

prepare 1.0.0 release

prepare releasing 0.9.0

prepare 0.8.1 release

CHANGES: prepare release