Add last set of updates.

.github/PULL_REQUEST_TEMPLATE.md

CHANGELOG.md

pacbio.wdl

samtools.wdl

seqtk.wdl

smoove.wdl

somaticseq.wdl

spades.wdl

star.wdl

strelka.wdl

stringtie.wdl

survivor.wdl

talon.wdl

transcriptclean.wdl

umi-tools.wdl

unicycler.wdl

vardict.wdl

vt.wdl

whatshap.wdl

wisestork.wdl