Add DoubleCommand v1.7
Add iSwiff cask

iSwiff is SWF Player.
add another special case for odd SourceForge URL

References: #5488
Upgrade Dropzone.app to v3+
Merge pull request #5545 from carlosefonseca/patch-1

Upgrade Dropzone.app to v3+
Update xACT 2.29 to 2.30

Update xACT 2.29 to 2.30
Merge pull request #5547 from reelsense/patch-6

Update xACT 2.29 to 2.30
Merge pull request #5544 from rolandwalker/new_sourceforge_special_case

add another special case for odd SourceForge URL
Give users hint that pkg installs work differently

Users should not have to open the Cask file to figure out why one
cask installs differently than another.

Closes #5402.
Add XScreenSaver v5.29
Add Google Nik Collection
Add Kensington TrackballWorks for Mac 1.1.2
Add TextSoap.app
Upgrade x2goclient to latest
Add Espionage.app 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
Fix markdown link in CONTRIBUTING.md

Added a missing closing parentheses.
Merge pull request #5557 from fapper/patch-1

Fix markdown link in CONTRIBUTING.md
Upgrade Geppetto.app to v4.2.0