Rewrite P4Perl to be more like P4Ruby.
This change does away
with the old P4/P4::Client split and pulls all the functionality
of P4::Client into P4. Hence P4::Client is now deprecated.
There are a few gotcha's - see the Changes file, and documentation
for the details, but in general it's backwards compatible.
As part of this change, I'm also releasing the previous current
versions of P4 and P4::Client as released versions - for posterity.
P4 now gets a v3.x version number so the old versions will stand out
clearly.
Hopefully it's all working - works fine for me - but people should
consider this a beta build, for now at least.