Implement as classpath://* but filter for given name.

Implemented an initial version.

classpath://x.* means each class that is in the package x (e.g., x.A, x.B, but NOT the class x.y.A) classpath://x.** means each class somewhere below x (e.g., x.A, x.B, x.y.A, ...)

A single '' can be used multiple times (e.g., x..blah..mypackage), but '*' is allowed only once.