snp-sites proper binary linux

Bump to 4.5.2

Bump to 4.5.1

Bump to 4.5.0

Issue #320 | don't overuse threads in --unmapped

Issue #312 | --targets needs abs_path

Issue #304 | run snpEff single threaded

Add defaults channel to bioconda conda install

Issue #290 | --tmpdir clash + --ram halving

Issue #291 | more checks with --tmpdir