Add test coverage for all nodes

Add tests for other scalar types

Fix parsing of special int syntaxes

Also add the means to test code parsing.

[5.4] Add direct dereferencing of new expression

(new A)->b(), (new A)->b, (new A)[0]. The feature is not implemented fully compliant (implemented as a `variable`, not `expr_without_variable

[5.4] Add direct dereferencing of new expression

(new A)->b(), (new A)->b, (new A)[0]. The feature is not implemented fully compliant (implemented as a `variable`, not `expr_without_variable`: Awaiting input on that on internals@.

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Add XML syntax highlighting in docs

More docs

Add an example

Make NameResolver add namespacedName subnodes

Start adding more extensive documentation

Add tests for XML serialization

Also fix the invalid namespace URIs I used.

Fix NameResolver for parameters without typehints

Add XML serialization and unserialization support

The unserializiation implementation currently is very hacky => needs some refactoring.

[5.4] Add full array dereferencing support

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