typo fixed: invokation -> invocation
Merge pull request #394 from ilya-klyuchnikov/spelling

typo fixed: invokation -> invocation
Update to Idea EAP 134.1342
test fix
Merge pull request #396 from JetBrains/rr/ik-test-fix

test fix
Change since to 134.1342 because of API changes and extend until
Add an intention to simplify negated expressions.

Given an expression of the form `!(a op b)`, replace it with `a !op b`.

For example:

    !(a < b)    -> a >= b
    !(a is Int) -> a !is int
Give tokens a value when possible

When a token can only have one value, store that value along with the
token. This is useful for unparsing kotlin.
Add a utility method for negating operator tokens
Respond to comments.

I'll squash these when the review is done.