- unsigned* was printed as unsigned
- Type **name was printed as Type**name

In preparation for finding macro uses.

* Macro: add offset and length
* MacroUse: add line
* Document: add convenience functions for finding a macro definition, use
  or undefined use at a given location.

Reviewed-by: Erik Verbruggen

Task-number: QTCREATORBUG-384
Reviewed-by: Thorbjørn Lindeijer <thorbjorn.lindeijer@nokia.com>

For example std::string, which is a typedef of std::basic_string.

Reviewed-by: Thorbjørn Lindeijer <thorbjorn.lindeijer@nokia.com>

Several special cases that are handled by the CPPEditor did not take
into account code that was using tab characters.

Task-number: QTCREATORBUG-292
Reviewed-by: Roberto Raggi

Encapsulate the details.

Reviewed-by: Roberto Raggi

Task-Number: QTCREATORBUG-409

Null pointer reference in a case where the global namespace is
explicitly specified using ::

Task-number: QTCREATORBUG-351
Review-pending-by: Roberto Raggi

Now, the ASTVisitor constructor takes a valid reference to a TranslationUnit.

Task-number: QTCREATORBUG-282