Python custom evaluators#88

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csirkeee wants to merge 7 commits intocloudcoderdotorg:masterfrom

csirkeee:pythonevaluator

Commits on Apr 17, 2015

Make it possible to add a custom evaluator to Python function problems
csirkeee
committed

Commits on Apr 18, 2015

Add checkbox to optional string field
csirkeee
committed

Commits on Apr 19, 2015

Commits on Jun 21, 2015

Fix places where old version of courses and problems page was displayed
csirkeee
committed
Fix creating a new problem, didn't work since evaluator added
csirkeee
committed

Commits on Jul 9, 2015

Upgrade Jython to version 2.7
csirkeee
committed