Added edeposit_amqp_harvester.py script.
#34; Changes in amqp_tool, to be able to use it from harvester script.
#34: Added settings for harvester module.
#34: Added harvester script. So far, without docstrings.
#34: Fixed bugs in harvester script.
#34: Added sphinx documentation for harvester script.
Added docstrings to harvester script. Fixed #34.
Added requirements to edeposit.amqp.harvester. Updated changelog.