fix unsucessful parsing by using post-receive

Introduce new post-receive hook for scheduling
sidekiq jobs on push.
fix post-receive hook
only consider master branch
Unlock IRIs when an error occurs while parsing.
Merge branch 'fix_push_but_no_ontologies2' into develop

Conflicts:
	git/hooks/post-receive
	git/lib/git_update.rb
Merge branch '982-iri_processing_error' into develop