Studio:Handling of pointer attribute tokens

As of STRIDE 3.0.0102 the syntax of scl_ptr and scl_ptr_sized has changed. The direction and usage attributes are changed to be string literals (put in quotes). The direction and usage attributes used to be specified with reserved token (such as IN, OUT, INOUT, RETURN, INRETURN, POOL, or PRIVATE) and that in many cases caused misterious compile failures when any of this token was user defined as something else. From this release on those attributes will required to be quoted. Previously written SCL will need to be updated or it would not compile anymore.