support native reads and writes into S3 about helio HOT 7 CLOSED

https://github.com/romange/gaia/blob/master/file/s3_file.h file can serve as an example of how it can be done

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Update: s3_demo works.
./s3_demo lists all buckets
./s3_demo --path s3://bucket/prefix will list files under the bucket
./s3_demo --cmd read s3://bucket/obj_path will output first K bytes of the file. If the bucket is located in a different region - error is returned.

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docker run --rm    -p 9000:9000    -p 9090:9090    --user $(id -u):$(id -g)    --name minio1    -e "MINIO_ROOT_USER=root"    -e "MINIO_ROOT_PASSWORD=12345678" -v ${HOME}/minio/config:/root/.minio   -v ${HOME}/minio/data:/data    quay.io/minio/minio server /data  --console-address ":9090"

and then export AWS_ACCESS_KEY_ID=root and export AWS_SECRET_ACCESS_KEY=12345678

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we do not get etag sometimes.

1.log

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As agreed with Ari - assigning myself to work on cloud snapshots (added a separate 'cloud snapshots' project which breaks this issue up a bit)

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Thanks Andy!
Please note this PR in progress - #133 which will remove icu/xml2 shared library dependencies from our binaries.

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I think this can be closed now given cloud snapshots were added in last release

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