Fix issue #16: Validation logic allows reusing periodic builder

Validation logic was preventing building multiple smoothers with periodic, flat trend or linear trend settings using the same builder (Issue #16).

This release includes the fix for #14, which we never pushed to central maven.

Fix issue #14: smoothSeasonal now validates width

SeasonalTrendLoess.smoothSeasonal(width) now validates width and if it is even or less than 3, modifies accordingly (moving to the next largest odd number if an even value was passed).

Remove slf4j dependency

Pushing this release to remove the unnecessary dependency on slf4j.

Also:

• Made some cosmetic tweaks to the demo notebooks.
• Added a missing Makefile to the Fortran benchmark code.
• Additional javadoc improvements.

Minor stats improvements and trend settings shortcuts

StlFitStats now includes the residual log-likelihood.
SeasonalTrendLoessBuilder now has setFlatTrend() and setLinearTrend() that will force the trend to be restricted accordingly.

Minor bug fix and javadoc improvements.

1.0.1

1.0.1