Add a cosmetic mode

[ichiriac]

This parser could be used to rebuild back from the AST a document, so some informations are lost during the transformations from tokens to AST.

With a cosmetic option set to true, we could retrieve these informations like :

• T_INLINE_HTML tags instead their T_ECHO transformation
• Whitespaces
• Short tags forms
• The brackets mode on namespaces or declares
• The optional paranthesis on echo, require ...

This list may not be exaustive, has to be improved

@todo Write the spec in the wiki

[ichiriac]

The next 1.0.0 release addresses all these features except whitespaces. The whitespaces can break the AST logic, in the same way that comments could do.