+ basic notification model by scaffold. for #236
+ notifications basics: controller actions, routes, user dependency. also slimmed down. for #236
notifications: + basic haml view & css & acl9. for #236
simple and functional notifications interface for users. for #234
wording votes to datarequests. for #214
preparing to use mailer with notification (mailer.yml need from now on), for #234 Inform paperproposal authors about rejection, for #237
testing data rejection notification. for #237
tests for notifications interface. for #236
auto vote + notification owners of free datasets used in paperproposals. for #219
+ migration and schema for dataset edits log. for #234
rudimentary model and view for dataset edit log. seeding edit description with conducted actions. for #234
improved visual appearance of edit log. for #234
js toggle for sidebar dataset edit log. for #234