more file to ignore.
Always load the data from the data folder.

This work independently of the current directory.
Fix the dataset loading when in the code directory.
Remove duplicate code and make it support the new dataset loading fct.
make exactly 5 part as travis-ci run only 5 jobs in parallel.
Code simplication following code review.
Merge pull request #28 from nouiz/master

Always load the data from the data directory