Upgrade Textadept.app to 7.6

Closes #6101.
Update VirtualBox to 4.3.16-95972
Merge pull request #6103 from whiteley/virtualbox

Update VirtualBox to 4.3.16-95972
LaTeXiT 2.7.1
Flash 15.0.0.152
Flash Player 15.0.0.152
ControllerMate latest
Merge pull request #6105 from ahbeng/flash-15.0.0.152

Flash 15.0.0.152
Merge pull request #6106 from ahbeng/flash-player-15.0.0.152

Flash Player 15.0.0.152
Merge pull request #6104 from ahbeng/latexit-2.7.1

LaTeXiT 2.7.1
Update Bit-Slicer to 1.7.3
Add Terraform v0.2.2
Add packer v0.7.0
Merge pull request #6108 from zorgiepoo/patch-5

Update Bit-Slicer to 1.7.3
Merge pull request #6102 from vitorgalvao/fix-6101

Upgrade Textadept.app to 7.6
Merge pull request #6110 from whiteley/packer

Add packer v0.7.0
Update Mailbox to 0.3.9
Merge pull request #6109 from whiteley/terraform

Add Terraform v0.2.2
Merge pull request #6107 from ahbeng/controllermate-latest

ControllerMate latest
Merge pull request #6111 from dlackty/mailbox-039

Update Mailbox to 0.3.9