Network.URI changes

[Sven Panne]

Two small remarks/questions about the new Network.URI:

    * I'm a little bit unhappy with the current spelling "fooUri" vs. "fooURI",
      both are used randomly in the module. I'd vote for a consistent usage of
      "fooURI", this is consistent with the rest of the hierarchical libs. An
      implication of this would be the need to invent a new name for "parseUri",
      because "parseURI" is already taken by an old function.

    * Should we deprecate parseURI, scheme, authority, path, query, and fragment?

Cheers,
    S.