Simplified docstrings
Added tests for `load_cv_folds`
Fixed major bug in `safe_float`

- `safe_float()` needs a string input to work correctly and it was being passed a float in some cases.
Use `text_type` instead of `str` in safe_float

- to deal with python 2 conversion issues.
Added template file for fancy output test
Added/Updated `tearDown()` methods
Added tests for `safe_float` number conversion
Updated test_regression.py

- Added new test for the regression fancy output descriptive statistics.
- Added `setup()` and `tearDown()`.