data: complex typename parsing

Added DataType class that can be constructed with a clang::qualType.
DataType keeps an internal QualifierList and ModifierStack.

bin/app/data/src/header.h

@@ -1,3 +1,24 @@
+/*
+class e
+{
+};
+class x: public e
+{
+};
+struct y;
+enum z;
+
+x foox();
+y fooy();
+z fooz();
+*/
+
+const bool *ab(int a, int b);
+
+bool const *abc(int a, int b);
+
+bool *const abcd(int a, int b);
+
 int main();
 void foo();
 int sum(int a, int b);