Fixing errors parsing anonymous functions.

PHP would display undefined `$properties['args']` warnings when the token
parser ran into an anonymous function. This fix improves anonymous
function recognition.
Fixing line number parsing for function call arguments.
Improving variable definition parsing.

We're now able to parse many more things in the body of a variable
definition by applying `TokenParser->parse_next()` to the body of a
variable definition.
Adding UTs for anonymous functions.
Fixing errors parsing anonymous functions.

PHP would display undefined `$properties['args']` warnings when the token
parser ran into an anonymous function. This fix improves anonymous
function recognition.
Fixing line number parsing for function call arguments.
Improving variable definition parsing.

We're now able to parse many more things in the body of a variable
definition by applying `TokenParser->parse_next()` to the body of a
variable definition.
Adding UTs for anonymous functions.
Merge branch 'anon_function_parser' of https://github.com/Mobius5150/vip-scanner into anon_function_parser
Merge pull request #115 from Mobius5150/anon_function_parser

Anonymous function parsing