adds edit mode for started experiment with fields related to tracks disabled
submission on this form only allows editing names and notes
updates tests
Merge branch 'develop' into feature/started_experiment_editing

Conflicts:
	ab_tool/templates/ab_tool/editExperiment.html
combines entrypoint for editing started and unstarted experiment
Merge pull request #96 from penzance/feature/started_experiment_editing

Feature/started experiment editing
Merge branch 'develop' into feature/new_ui