update selenium version for travis.ci to 2.41.0
remove public function "wantToUseJQuery. change hideElement function to private"
add new feature and config param "saveCurrentImageIfFailure"
add new line at the end
Merge branch 'master' of github.com:DigitalProducts/codeception-module-visualception
update codeception2 binary for tests. set executable flags for codeception bnaries.
merge conflicts and add incomplete test for writing current image to debug folder.