Performance wrapper

Using a wrapper and a 11Mb test BAM file. The wrapper written in Python uses the communicate method from subprocess, while the Perl wrapper uses IPC::Run3.

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
cat example_data/panel_01.bam | covtobed	569.5 ± 13.9	549.4	587.1	1.00
covtobed example_data/panel_01.bam	572.0 ± 19.1	543.6	601.8	1.00 ± 0.04
./covtobed.pl example_data/panel_01.bam	599.8 ± 9.9	584.8	614.3	1.05 ± 0.03
./covtobed.py example_data/panel_01.bam	611.6 ± 29.5	584.5	660.4	1.07 ± 0.06
cat example_data/panel_01.bam | ./covtobed.py	645.9 ± 18.6	628.0	679.2	1.13 ± 0.04
cat example_data/panel_01.bam | ./covtobed.pl	648.5 ± 26.2	621.4	692.2	1.14 ± 0.05