Update transmit cask to version 4.4

Update transmit cask from version 4.2 to 4.4
Install Virtualbox

Actually run the installer for virtual box.
Add link param to Transmit 4.4 cask

Add link param to Transmit 4.4 cask
link Postgres.app
Merge pull request #349 from abukin/link-postgres

link Postgres.app
update SourceTree to 1.6.0.1
Merge pull request #351 from abukin/update-sourcetree

update SourceTree to 1.6.0.1
add tikz-editor.rb
Merge pull request #356 from BenLauwens/tikz-editor

add tikz-editor.rb
Update eclipse to 4.2.2 and add link line
Merge pull request #357 from BenLauwens/eclipse

Update eclipse to 4.2.2 and add link line
Add unison.rb
Merge pull request #358 from BenLauwens/unison

Add unison.rb
Add Cloak cask
Merge pull request #359 from mfilej/cloak-1.2

Add Cloak cask
Update chromium to 27.0.1453.93
1Password 3.8.21
Merge pull request #361 from bdd/1Password-3.8.21

1Password 3.8.21
Merge pull request #360 from tlvince/chromium-update

Update chromium to 27.0.1453.93
Merge pull request #341 from ragusource/transmit-44

Transmit 4.4