[svn r104] TONS OF FIXES.

Split up declaration, constant initializer gen and definition for globals, structs, classes and functions.
Improved ClassInfo support (not complete), not in vtable yet.
Fixed a bunch of forward reference problems.
Much more. Major commit! :)

gen/functions.h

@@ -0,0 +1,12 @@
+#ifndef LLVMDC_GEN_FUNCTIONS_H
+#define LLVMDC_GEN_FUNCTIONS_H
+
+const llvm::FunctionType* DtoFunctionType(Type* t, const llvm::Type* thistype, bool ismain = false);
+const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl);
+
+void DtoDeclareFunction(FuncDeclaration* fdecl);
+void DtoDefineFunc(FuncDeclaration* fd);
+
+void DtoMain();
+
+#endif