Add sci-biology/biobambam: a tool for bam file processing

This commit adds ebuilds for:

 * [biobambam](https://github.com/gt1/biobambam), a tool for bam file processing, and
 * [libmaus](https://github.com/gt1/libmaus), a dependency with data structures and algorithms
If you are not running autoreconf or doing patching, you don't need this eclass. Standard phases are enough.