HACKING doc re: `brew cask upgrade`

with issue tracking link
remove md5 checksum support

Following up on #2719.  MD5 checksums are
* nowhere mentioned in our docs
* not used in any existing Cask
* deprecated in Homebrew
Therefore it seems sensible to delete this code.
Add Synology Cloud Station v3005; Add Synology Photo Station Uploader v045
Updated Dogecoin-Qt to 1.5.2
Add HippoConnect.app v1.0.6
Added OpenSesame

OpenSesame is a graphical, open-source experiment builder for the
social sciences. It sports a modern and intuitive user interface that
allows you to build complex experiments with a minimum of effort. With
OpenSesame you can create a wide range of experiments. The plug-in
framework and Python scripting allow you to incorporate external
devices, such as eye trackers, response boxes, and parallel port
devices, into your experiment.
Added MacTerm

A powerful replacement for the Mac OS X Terminal.
temporary hack: suppress searching the font tap

this is needed to reduce noise on searches until search
can be made more configurable
rename cdto.rb

to cd-to.rb
per naming rules in CONTRIBUTING.md
rename zero-ad.rb

to zeroad.rb
per naming rules in CONTRIBUTING.md
rename serial-cloner.rb

to serialcloner.rb
per naming rules in CONTRIBUTING.md
rename mirror-displays.rb

to mirrordisplays.rb
per naming rules in CONTRIBUTING.md
rename photo-ninja.rb

to photoninja.rb
per naming rules in CONTRIBUTING.md
rename mysql-workbench.rb

to mysqlworkbench.rb
per naming rules in CONTRIBUTING.md
rename torus-trooper.rb

to torustrooper.rb
per naming rules in CONTRIBUTING.md
rename space-monkey.rb

to spacemonkey.rb
per naming rules in CONTRIBUTING.md
rename deal-alert.rb

to dealalert.rb
per naming rules in CONTRIBUTING.md
rename nzb-vortex.rb

to nzbvortex.rb
per naming rules in CONTRIBUTING.md
rename vlc-streamer.rb

to vlcstreamer.rb
per naming rules in CONTRIBUTING.md
rename right-zoom.rb

to rightzoom.rb
per naming rules in CONTRIBUTING.md