Fix download protocol in OmniFocus.app Cask

Changed https to http because the former has stopped working
Add DoubleCommand v1.7
Add iSwiff cask

iSwiff is SWF Player.
Add Google Nik Collection
Add TextSoap.app
Upgrade x2goclient to latest
Delete special files (eg symlinks) from pkg BOMs

`pkgutil --only-files` plus `pkgutil --only-dirs` does not
cover all files in the BOM.

Closes #5491
Add Sony Homestream v1.1 cask
sha256 is :no_check, version is 'latest'
Add Beatport Pro v2.5.0
Add Rekordbox v3.0.0
audio-mate 2.0.4
Merge pull request #5567 from chulkilee/audio-mate-2.0.4

audio-mate 2.0.4
Merge pull request #5565 from dziemba/beatport-pro

Add Beatport Pro v2.5.0
Beatport Pro: Make easier to update
Merge pull request #5568 from nanoxd/master

Beatport Pro: Make easier to update
Merge pull request #5556 from fapper/homestream

Add Sony Homestream v1.1 cask
Merge pull request #5551 from mtneug/x2goclient

Upgrade x2goclient to latest
Merge pull request #5550 from lucashorton/textsoap

Add TextSoap.app
Merge pull request #5549 from lucashorton/google-nik-collection

Add Google Nik Collection