This is the first release of `fgpyo` version 0.0.1.
Modules included are:
* `fgpyo.sam.SupplementaryAlignment`: stores a supplementary alignment record produced by BWA and stored in the SA SAM tag
* `fgypo.sam.Metric`: a class for all metric-like tab-delimited files. Metric files are tab-delimited, contain a header, and zero or more rows for metric values. This makes it easy for them to be read in languages like `R`. This allows implementing classes to extend [`attr`](https://www.attrs.org/en/stable/examples.html) classes, have attributes be _typed_, and read and write to tab-delimited files with types properly preserved. This is inspired from the [`Metric` in the fgbio-scala repository](https://github.com/fulcrumgenomics/fgbio/blob/master/src/main/scala/com/fulcrumgenomics/util/Metric.scala).
* ancillary methods to support inspecting and maintaining types in `fgypo.sam.Metric`