generalize section on Dropbox URLs

and explain why they should be avoided
Merge pull request #6562 from rolandwalker/rename_toad

rename toad-mac.rb to toad.rb
Merge pull request #6561 from rolandwalker/remove_keepassx_caveats

remove transitional caveats in keepassx
Merge pull request #6566 from rolandwalker/doc_personal_hosting

generalize section on Dropbox URLs
remove abandoned skii.rb

* Original homepage (http://www.awesome-studio.tk/) taken over by squatters.
  I get various redirections, including one which generated a malware warning.
* The `url` points to an anonymous cloud.app user.
* The macupdate page referenced as `homepage` points to the same cloud.app
  download.

It seems that nobody is vouching for this binary.  Historical awesome-studio.tk
is also blocked from the Wayback Machine.  We have no information about the
provenance of this app, and should not include it.
Merge pull request #6563 from rolandwalker/hanynet_license_other

license :oss for all hanynet software
Merge pull request #6570 from rolandwalker/remove_skii

remove abandoned skii.rb
comment use of cl.ly url in lightpaper.rb
Upgrade typinator to 6.2

Closes #6571.
Merge pull request #6573 from vitorgalvao/fix-6571

Upgrade typinator to 6.2
comment/caveat use of macupdate in ap-grapher.rb
comment/caveat use of macupdate in icursor.rb
comment/caveat use of macupdate in multibrowser.rb
homepage, comment, caveats for abandoned sevenzx
New home for abgx360
Delete monochrome.rb

It can only be downloaded now after purchasing. There is no trial.
updated rftg (0.9.4)
Merge pull request #6576 from vitorgalvao/update-rftg

updated rftg (0.9.4)
updated geektool license
comment use of dropbox in abgx360.rb