Conflicts:
	app/views/projects/issues/show.html.haml
	db/fixtures/development/09_issues.rb
	db/fixtures/development/10_merge_requests.rb

we should not use `console.log` in production code...

Notify email to mentioned users; show participants ala github on issuables

Database seeding failing

[Doc] Update 5.0 to 5.1: Recompile assets

Fix wrong file versions in update docs (5.2 to 5.3)