Web fixes

[clegaspi]

Made changes to fix errors shown in the web log.

• Ensured plot view didn't update if data query came back incomplete.
• Fixed bug where data was being overwritten because of a non-uniquely named variable.
• Ensured graph traversal didn't occur and no error is thrown if user inserts garbage into a field. TODO: Tell the user their input was invalid.
• Inform users if the point they click on in plot view cannot be found on MP because of deprecation. I think this just means we need to do regular builds and that it's time to update the database. It's been a couple months.
• Move point clicking info to debug logging so it's not printed to the log by default.

[coveralls]

Coverage decreased (-0.2%) to 84.875% when pulling 33493eda74011be980b0a027b19fe7059fabdc72 on fix_web_errors into 085035b81efefc0bcb7207a34d4a16c214efbaff on master.