Update samples/search/hello_world.py

pep8 fixes
Update README.rst

pep 8 fixes
Update docs/search_problems.rst

pep8 fix
Merge pull request #40 from pedromagnus/master

pep8 fixes
kfold: Added parameter checking, fixed an off-by-one and changed some variable names with the intention of making it more readable
Added missing tests to evaluation, they are basic, but better than nothing
Changed the precision interface to remove a redundant argument
- Fixed pickle-ability for classification problems that use @is_attribute
- Fixed an attribute ordering so classificators that rely on attribute vectors can be retrained with repeat-ability.
Some local search algorithms can continue when no better result was found, if there is possibility of a later improvement, if iterations limit was specified (if not, stop)
Up minor version
Merge branch 'develop'