less logging while testing
basic AMQP
amqp improvements

* fix path setting
* more details on 'list'
* prefix stripping (both ways)
fixed logging to AMQP
* AMQP interface works.
* install amqp monitor
depend pn python-amqp

also remove python-flask: not used
monitor: fix "delta" implementation

plus test
fix log_exc() calls to always use keywords
* monitor "delta" fix