added get fragment
integration testing in progress
Integration testing complete, unit tests also updated
removed duplicate logging stuff
removed problem_step_manager from repo
had to adjust tests for the logging
space
Merge pull request #50 from tutorgen/hint-factory-student-model

Hint factory student model
First commit of the load testing tutor.
Fixed a problem with the problem generator crashing when daemonized.
.
Added the creation of students to the tutor.
Updated the knowledge tracer with some additional functionality.
.
Load Testing Tutor is mostly done.
Finished load testing tutor.
Fixed merged conflicts and test conflicts.
Updatedness.
Fixed a bug with generating two step equations.
Fixed a ton of bugs.