String#contains() is not defined

[stephanrauh]

For some reason, JUA complains about the missing contains() function. Maybe it's better to replace the two occurences with indexOf()>=0.

As far as I can see, jQuery is initialized before JUA:

[marcorinck]

indeed, String.contains is not javascript standard (its coming from our internal library), sorry about that. This should be fixed, yes.

However, I prefer to seperate pull requests of issues, as the other issue your PR is trying to fix, needs to be discussed.

Can you split the PR #4 please?