[bsongz] Add compression support to BSONFileInputFormat.

- Prevent BSONSplitter to try to split compressed files.
- BSONFileRecordReader detects whether a file is compressed, and if so,
use the proper codec. This code is heavily inspired for the one from
TextInputFormat.
[bsongz] Adjust build parameters to Criteo

- bump fix version
- bump cdh version to 4.4.0
- use mr1
Merge pull request #1 from criteo/bsongz

Compressed BSON file support + Criteo specifics