string formatting for final accuracy

Signed-off-by: cheesinglee <cheesinglee@gmail.com>
sequential model building option

Signed-off-by: cheesinglee <cheesinglee@gmail.com>
re-order dataset creation

Signed-off-by: cheesinglee <cheesinglee@gmail.com>
Merge branch 'master' of github.com:cheesinglee/bigml-feature-subsets