Merge pull request #1 from mredar/master

Use RQ to start harvest, also start ec2 instances if necessary
Update README.md
default path change ucldc_harvester to harvester
Merge branch 'master' of https://github.com/mredar/harvester
Merge branch 'master' of https://github.com/mredar/harvester
Read ~/.harvester-env for environment setup
Merge branch 'master' of https://github.com/mredar/harvester

Conflicts:
	start_harvest.bash