added scrapelib caching to attachment loader, bamboo related changes to shell loaders
updated grants loader scripts to work with bamboo, broke out attachment loader
added bamboo configuraiton
added timeouts and data source to attachment folders
quick python script for cleaning old attachment dirs
added cache expiration
added scripts for disk usage, ES health, needs email integration
added weekly loader script, bamboo config updated
Merge branch 'bamboo'

Conflicts:
	loaders/attachments/requirements.txt
	loaders/bids.state.gov/bids-nightly.sh
	loaders/fbo.gov/fbo-nightly.sh