Improve test run.php

* Add two more ignored tests (not real pretty print differences)
* Measure more times

[5.4] Add support for traits

[5.4] Add support for static closures

This adds another property to Expr_Closure named "static". It's true for static closures and false otherwise.

Move some uses of the toArray() macro

Previously it was applied both to the result of inner_statement_list and statement, whereas only the latter required it.

Stop using ArrayObject for nodes

Instead manually implement IteratorAggregate and define the required magic methods. The reasoning behind this is:
a) Extending ArrayObject is always risk

Stop using ArrayObject for nodes

Instead manually implement IteratorAggregate and define the required magic methods. The reasoning behind this is:
a) Extending ArrayObject is always risky, because a lot of magic which is known to be buggy is involved
b) This allows to lateron change the implementation for the nodes altogether, for example it could be changed to using real public fields instead of a $subNodes array.

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Make more things optional

Make $stmts and $subNodes optional in most places

[API] Rename Stmt_Func to Stmt_Function

[API] Make all constructors specialized

For nodes that accept many optional arguments I chose to keep the $subNodes argument, but provide default values instead.

Fix unit tests

[API] Rename LambdaFunc to Closure

The term "closure" is more commonly used in PHP, even if the function doesn't use() any variables.

Add some more constructors

Remove zend_language_parser.y from distribution

[5.4] Add support for ClassName::{expr}

Slightly clean up scalar/static_sclar/common_sclar

name rule is now in common_scalar as it is shared. T_STRING_VARNAME is in encaps_var now.

Add class_name_or_var nonterminal (to simplify)

class_name_or_var nonterminal is class_name | reference_variable

[5.4] Add callable typehint

Need to refactor how typehints are saved. Saving array and callable typehints as strings isn't clean

[5.4] Add support for short array syntax

[5.4] Add object method array dereferencing

Other array dereferencing support will follow. Added this in advance as it simplified the code.

[5.4] Add new tokens

This is to not throw noticed when parsing not yet supported code on 5.4

Allow __halt_compiler(); after braced namespaces

run tests with all errors enabled

Add support for ClassName::$$a()

Fix AST for ClassName::$methodName()

Exclude fatal errors one some files from PHP tests

Circumvent token_get_all bug with b"$var"