add a new provider named file
update licensing on all the fixtures
first pass at downloading from http
library method for nexus sha testing. logic for checksum_valid
fix copy/paste error with fixtures
documentation and fix bugs found
clarify log output and convert artifact_deploy resource
remove extra line
update readme and remove force attribute
bulleted lists are fun
add an example
Merge pull request #70 from RiotGames/nexus_verification

Nexus Downloads should automatically ask the Nexus server for their checksum