Document getDocComment and getLine

Add some more unit tests

Fix incorrect line number extraction

Start adding Unit test (PHPUnit)

add NodeTraverser

Make the parser run without errors on 5.4

Associate last encountered doccomment with next node

Add missing #line hint for strings

Fetch start line instead of end line

Remove reentrant error handling code (we don't need that currently)

Add README for grammar folder

fix typos

Put statements belonging to a namespace statement into its stmt property, add some further checks against invalid namespace usage and fix the pretty printer to print global namespaces

Use ArrayObject for Nodes to abstract away array access implementation details

Move halt_compiler handling from parser to grammar

Associate some line information with nodes (currently the line the node ends in, as the starting line is harder to fetch)

fix incorrect usages of old ParseErrorException

Rename PHPParser_ParseErrorException to PHPParser_Error

Add Autoloader

Prefix all classes with PHPParser_

Fix typo Expr_ErrorSupress -> Expr_ErrorSuppress

Fix pretty printing issues caused by Expr_InstanceOf vs Expr_Instanceof

Make halt_compiler() work

Fix ambiguity when pretty printing dynamic property fetches with arrays

Throw ParseErrorException on error instead of error callback

As long as the parser isn't reentrant having an error callback doesn't really make sense and only complicates everything.