added start_job!
added activity_progress (still some work todo)
update to cactivity com
add progress, preparing and finishing msgs
Fix issue with heartbeat when upload takes too long
Improved SQS messages to include only necessary data
Communicate works good:
- start_job
- activity statuses
Created "client_example" with a Poller and Commander to listen to SQS and issue commands
Merge pull request #19 from koxon/master

Major update