Start variable definition module
redesign variable definition for better reusability
add test cases
add ending line
add a method for easier use in prediction
minor fixes
Implement scaled log transformer with sklearn Transformer API
Remove get_params, set_params in inputs.py
Simplified variables with tests
Add loads/dumps to ModelDriver for serialization
Remove old model driver
Merge pull request #11 from seomoz/matt

Simplify variables