This simplifies code as there is no longer a distinction between
"normal" providers and introspection providers in ProviderManager
necessary.
It's also easier to get an idea where introspection is used for parsing.
Move some duplicate code from XMPP(TCP|BOSH)Connection to
PacketParserUtils. Remove TestUtils as the method now part of Smack's
public API in PacketParserUtils.
instead of using the old baseName=smack appendix=project.name approach,
we are now going convention over configuration and renaming the
subprojects directories to the proper name.
Having a prefix is actually very helpful, because the resulting
libraries will be named like the subproject. And a core-4.0.0-rc1.jar is
not as explicit about what it actually *is* as a
smack-core-4.0.0-rc1.jar.
SMACK-265
