[x] UI: change experiment_owner to experiment_member in the experiment_detail.html template
[x] API/UI: Project membership request - add user to project as project_member when approved (project_owner addition is a manual operation)
[x] API/UI: Experiment membership request - add user to experiment as experiment_member when approved
[x] Email: annotate emails that are informational about a specific user
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***** ATTENTION - an email has been sent to the user as denoted below - ATTENTION *****
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Updates from feedback
experiment_ownertoexperiment_memberin the experiment_detail.html templateproject_memberwhen approved (project_owneraddition is a manual operation)experiment_memberwhen approved