Essentially reverts #8, but this is in scope of a bigger change.

Also clearly separate built-in functions and built-in types because some
used to be duplicated.

The previous attempt just didn't work because of two reasons:
1. The "dotted_name" was already consumed in function-call's "begin"
   match.
2. All "special" identifiers were essentially matched before the
   function call which meant that the actual call would never be
   matched since the function to be called (the identifier) was already
   consumed.

Simplify #dotted_name a bit in the process.

The print statement can now only be matched if it's not used in a
function previously since otherwise it would've been consumed.

Although it looked okay-ish with background color it was not intended.

Otherwise, color schemes defining a background color for
`entitiy.name.function` would make decorators span the remainder of the
line.

Previously, `self.CONSTANT` was not matched.

Or well, it's only valid syntax in Python 3.

Even though we can't really match that correctly, at least match the
leading dot on a new line or after a function call. That's more correct.

Example:
ident = (value.dotted
         .__init__)

It could be of use for regression testing later, or whatever. In any
case it should illustrate most of the changes of my pull request and can
easily be extended.

update

Better function match