Fix RamdiskId typos
Customization in aws_request(xml) and erlcloud_mon
add make_get_url to return simplified url refactor to share code
store s3 user-defined metadata
Fix the startup order of public_key
Fix the name of the environment variables
the right names.
Use os:timestamp instead of erlang:now for link expiration
R15 includes several new opcodes, so if you are using R14 the other rebar that was included here was unusable (as it was compiled under R15). This takes that same exact rebar and compiles it with R14, which removes the problem.