added instance meta-data creds query
switched creds check order
Switched from assoc list to map

Fix decoding error
added iamTokens
added iam tokens to s3
made Owner in s3 optional
check if instance metadata available

To speed up credential fetching.
fixed timeout
corrected network comment
Merge pull request #106 from maxpow4h/instance-metadata

Instance metadata
Added exception for missing credentials
Merge pull request #107 from maxpow4h/tidy-network

Tidy Previous PR
remove aeson upper bound
ghc 7.8.3
prepare release
add makeCredentials function (fixes #109)
add DeleteBucket and NukeBucket examples (fixes #110)
Removed redundant do and return
Removed another redundant do
Merge pull request #111 from maxpow4h/patch-1

Removed redundant do and return