introduces experiment as the base object for tracks and intervention points
changes backend and templates to use experiment
adds placeholder experiment creation object so codebase still works with one experiment
fixes imports
adds convinience method to test for authorization of retrival on course objects
urls and tests still broken
updates track pages tests
adds assertOkay to tests common as well as test object convinience functions
renames bad variable
missing imports
updates tests to use test object constructors
fixes indentation
Merge branch 'feature/test_refactor' into feature/experiment

Conflicts:
	ab_tool/models.py
	ab_tool/tests/test_intervention_point_pages.py
	ab_tool/views/intervention_point_pages.py
	ab_tool/views/track_pages.py
fixes missing url parameters and broken tests
Merge branch 'develop' into feature/experiment

Conflicts:
	ab_tool/tests/common.py
	ab_tool/tests/test_intervention_point_pages.py
	ab_tool/tests/test_main_pages.py
	ab_tool/tests/test_models.py
	ab_tool/tests/test_track_pages.py
Merge branch 'feature/test_refactor' into feature/experiment

Conflicts:
	ab_tool/tests/test_intervention_point_pages.py
Merge branch 'master' into feature/experiment

Conflicts:
	ab_tool/controllers.py
	ab_tool/exceptions.py
	ab_tool/models.py
	ab_tool/urls.py
	ab_tool/views/intervention_point_pages.py
	ab_tool/views/main_pages.py
	ab_tool/views/track_pages.py
finishes integrating experiments with track weights
fixes broken tests
refactor
Merge branch 'feature/test_refactor' into feature/experiment

Conflicts:
	ab_tool/controllers.py
	ab_tool/models.py
	ab_tool/views/intervention_point_pages.py
	ab_tool/views/main_pages.py
	ab_tool/views/track_pages.py
Merge branch 'develop' into feature/experiment
Merge branch 'feature/test_refactor' into feature/experiment
fix
implements changes for multi-experiment support to models and controlers
Merge branch 'feature/experiment_partial' into feature/experiment

Conflicts:
	ab_tool/controllers.py
	ab_tool/models.py
	ab_tool/views/intervention_point_pages.py
	ab_tool/views/main_pages.py
Merge branch 'feature/experiment' of github.com:penzance/ab-testing-tool into feature/experiment
parital test update
Merge branch 'feature/experiment_partial' into feature/experiment

Conflicts:
	ab_tool/tests/test_intervention_point_pages.py
	ab_tool/tests/test_track_pages.py
updates admin