Namespaces

[Leopold Toetsch]

The archives have tons of articels regarding namespaces, mostly HLL 
policies and such, but little about Parrot semantics.

I've started a new test file t/pmc/namespace.t that summarizes some of 
the current possibilities of namespace manipulation with Parrot.

Please have a look at the supported syntax constructs. Are these 
sufficient for HLL writers?

leo
PS more tests welcome