#120 manual update and pool config changes

[David Jencks]

I've updated resource.xml (ch 3) of the manual to
reflect the mbean-ref's in the ConnectionFactoryLoader
config. I would greatly appreciate someone checking
the examples for mysql and postgres.

I've simplified the pool configuration significantly.
The new pool parameters are:

PoolConfiguration=per-factory[per-user]
MinSize=0
MaxSize=10
BlockingTimeoutMillis=5000
IdleTimeoutMinutes=30
CleanupIntervalMinutes=10
MaxIdleTimeoutPercent=1.0

Blocking is always on. IdleTimeout cleanup is always
enabled. Garbage collection is eliminated. (there is a
jca procedure for removing broken connections: I'm not
sure if it's implemented). The IdleTimeout and
CleanupIntervals are now in minutes rather than
milliseconds.

The implementation of these changes not very neat,
sorry. I'd rather get an appropriate interface into
the alpha and clean up the implementation later.