removed S3Handle class and unused S3IStream
merged latest head
use one single HttpRestProxy for all S3 connections
moved http_named_endpoint into the .cc file; allowed extra response headers to be set
Merge branch 'master' of github.com:datacratic/soa into s3-handle-removal
added basic ability to publish to an Amazon SNS topic
cleanup of SNS code
better documentation on SnsApi class
Merge branch 's3-handle-removal' of github.com:datacratic/soa
Merge branch 'master' of github.com:datacratic/soa
fixed problems with S3 uploads: 1) can write zero-length files; 2) no longer attempt to continue uploads (clear old ones instead)
Merge branch 'master' of github.com:datacratic/soa