Tidy up of the client interface code - more commonly known as the
"right hand side of the server". Right since the start the filter
side of the server has been nice and tree like - every Filter sent
data to another Filter. At the top of the tree there was a "special"
Filter known as the RootFilter, which to the other Filters just
looked like a normal Filter. This was nice, and simple, and expandable.

The Client Interface on the other hand was messy. The root filter
had some hacky wrapper threads which pulled from a queue and pushed
to the relevant client interfaces (one for real time stuff, and the
other for databases). There was no simple room for expandability -
it was all hardwired to do just what was needed at the time.

This commit changes that. A Client Interface now connects to another
Client Interface, with a special one being found in the RootFilter
(yes, maybe that needs a name change now :-). So we can chain client
interfaces, and move other bits and bobs around in the server - for
example, alerting no longer needs to be connected to the Client
Interface, it can connect straight to the RootFilter (or, wherever
the config tells it ;).

Hopefully this sanitizes the underlying layout of the server a bit.

As a final note, I dropped the DBInterface. This used to insert
data in to a MySQL database. We've long since stopped using that,
and it's fallen behind and is way out of date. For now, it's gone
in to the attic.

Fix for upgrade to Jacorb 1.4.1. It's our fault actually, we've not been
correctly using the names when binding to the Naming Service. This needs to
be fixed properly at some point, but for now I've changed changed the code
so it "means" the same as it did before the upgrade.

i-scream is now licensed under the GPL. I've added the GPL headers to every
source file, and put a full copy of the license in the appropriate places.
I think I've covered everything. This is going to be a mad commit ;)

Opps... if both were null it would try and start them :)

Now only enforces a dependency on either the Client Interface or the Database
Interface if it is configured. This ensures that the startup order is still
correct (which it wouldn't if the checks were removed), but also doesn't enforce
the checks when one of the interfaces is disabled.

Added queue size limit. This is provisional, if it is a success it will be
mirrored across the whole server.

Of course, being my usual sensible self, I potentially had a situation where by
I would log to the Logger than the Logger isn't running. Clever eh ? :)

New dependency checking. The old method was to attempt to start a Component, and
if it failed, it probably had a depdency problem. The approach now is to ask the
Component to perform a dependency check first, then if this suceeds, have a go
at actually starting it up.
The actual dependency check is a bit neater and more precise than before, and
should be much more fool proof. The order the components are specified in the
default.properties file is now irrelevant, although the "correct" order would
certainly increase booting time.

now doesn't worry if it can't find certain configuration options
mainly if it hasn't got a configured interface
as it just crashed and burned up till now if you selected NOT to start one
I'm sure it used to work, but it didn't today so I changed it ;)

Modification to the Queue system;
- interval of monitor is now configurable.
- attempt to identify each Queue better, although this is still hard.

A tidy up of the configuration getting section.

Best catch some exceptions... correctly.

TEMPORARY: Added some temporary code to log the queue status. Messy,
and will definately need to be fixed. (error in previous commit)

Changes to reflect move of Component, ComponentStartException, and the
ReferenceManager from util to componentmanager.

Implemented use of the CIWrapper class, and the Queue.

fixed some silly bugs

supports not starting particular interfaces.

Modified to use the dbinterface

added line to redefine the toString()
its temporary...but what the hell...when we do our funky class to have a standard toString() it might be better! ;-p

Updated to use the uk.ac.ukc.iscream.util.ReferenceManager

Made changes to fit in with the new package structure. Also made sure all files
conform to the template class.

Main method for a Root Filter. The Root Filter lives at the root of the filter
system, and will ultimately deal with the deliver of data into the system.