New features
- Option for compressed output: `-z, --gzip`
- Option to suppress MongoDB padding from JSON output: `--no-padding`
Bugfixes
- Only concatenates appropriate temp files when building final output (previously, would concat all file in temp directory)
- Only deletes appropriate temp files (previously, would empty the entire temp directory)
- Provide a more useful error message when provided with an invalid FASTQ file (if seq and qual lengths don't match, for example)