Update speedlog and performance tests for ThreeMotor.
Introduction of expression class to handle descriptions of basic events.
Closes #62
Cleanup of redundant non-functional code.
Add support for Constant expressions.
Closes #63
Add tests to throw error for basic events without expression.
Add a check for house events without boolean expression description.
Make main function to catch new exception types and suggest reporting
bugs.
Provide support for parameters in input files.
Closes #64
Make undefined parameters to cause errors.
Add tests for doubly defined parameter.
Introduce flavored AND and basic event for Inhibit, conditional,
undeveloped.
Add check for circular logic in parameter definitions.
Closes #70
Provide probability input value check for primary events.
Exclude expression header file from test coverage report.
Add mission time and trials into settings.
Introduce Mission time expression.
Closes #71
Make Random number generator static.
Add uniform, log-normal, normal, histogram, beta, and gamma deviates
in expressions.
Code cleanup with Cpplint and Cppclean.
Add support for random deviates in input files for event descriptions.
Closes #65