remove Homebrew namespaces in homebrew-fork

* remove two Homebrew modules
* rename Homebrew.system
* rename HomebrewArgvExtension
* remove some unused requires

still todo: constants starting with HOMEBREW_
upgrade to musicbrainz-picard 1.3.1
Add Hocus Focus
Merge pull request #8369 from rolandwalker/remove_homebrew_namespace

remove `Homebrew` namespaces in homebrew-fork
dogecoin 1.8.1

Version bump, and updated the license note as per the MIT license at
https://github.com/dogecoin/dogecoin/blob/master/doc/README.md
Updates eid-mw to v4.0.7

Also updates the homepage to point to the official website. The dmg
package will be downloaded from there too.
And also mentions that java is required. It has been tested with java 6,
7 and 8.
Add 'The Tagger.app'
Merge pull request #8379 from DomT4/doge

dogecoin 1.8.1
Merge pull request #8376 from varju/picard-1.3.1

Musicbrainz-picard 1.3.1
New cask for Shapes (shapesapp.com)
Merge pull request #8382 from j13k/master

New cask for Shapes (shapesapp.com)
Merge pull request #8380 from href/the-tagger

Add 'The Tagger.app'
Merge pull request #8377 from kevinoconnor7/add-hocus-focus

Add Hocus Focus
Merge pull request #8026 from jeroenj/eid-mw-update

Updates eid-mw to v4.0.7
Corrected telegram cask

Closes #8381.
Merge pull request #8383 from vitorgalvao/fix-8381

Corrected telegram cask
Update Clion to 140.1221.2
updated d235j-xbox360-controller-driver.rb to stable
Merge pull request #8385 from Ter0/update-clion-eap

Update Clion to 140.1221.2
Remove homebrew-fork Checksum class and refactor

* perform actual checksum calculation within download.rb
* use an accessor named sha256 instead of sums for checksum data
* migrate checksum-specific exceptions out of homebrew-fork