Add support for S3 Select using query parameters

[gmoon]

Return a subset of s3 data using s3 select. Append a query such as:

http://localhost:3000/twitter.json?expression=select * from S3Object

For the initial release, try to detect InputSerialization parameters from the file (.json or .csv) and compression (.gz, .gzip, .bzip2, .bz2). Use and document sensible defaults but allow for overrides. OutputSerialization should mirror InputSerialization as a default, but also allow for overrides.