Adding a cask for the mail plugin MailFollowUp

The installer comes with an uninstaller app (an Automator Workflow at
heart), but I wasn't able to run that with 'script' so I set the
uninstall to manually delete the plugin folder.
add Slack cask formula
Merge pull request #2112 from taylorlapeyre/master

add Slack fomula
Sparkle 1.5b6
Merge pull request #2115 from hanxue/sparkle

Sparkle 1.5b6
correct various issues with the slack formula
Merge pull request #2116 from taylorlapeyre/master

Correct various issues with the slack formula
corrected some namings, according to conventions
Merge pull request #2118 from vitorgalvao/correct-some-namings

corrected some namings, according to conventions
Merge pull request #2080 from lowbatteries/mailfollowup

Adding a cask for the mail plugin MailFollowUp
SpeedCrunch 0.10.1

Added cask for installing Qt-based calculator, SpeedCrunch.
add mailmate
replace sha1 with no_checksum

realized that a checksum doesn't make any sense for a cask whose
version is "latest"
Shortcat 0.6.4
Merge pull request #2124 from Cottser/shortcat-0.6.4

Shortcat 0.6.4
Update XLD to 2013/11/02
Merge pull request #2125 from bcse/xld-2013.11.02

Update XLD to 2013/11/02
Fix home url for slack.rb
Merge pull request #2126 from davidosomething/patch-1

Fix home url for slack.rb
haroopad 0.9.1