Add Alfred 4 support

Closes #14

Use Alfred's settings API and improve icons

• Use Alfred's AppleScript API to change settings
• Make icons more distinctive #11

Handle multiple apps with same bundle ID

Fix #12

Fix handling of apps that aren't installed

Don't choke if the active application isn't installed #6

Fix #5

App info also shown for non-running apps #5

Add support for Tunnelblick and rename workflow

Workflow now also supports Tunnelblick, an open-source equivalent to Viscosity.

Update Alfred-Workflow

Better session handling for great speed.

Update Alfred-Workflow

Fix issues with background processes on Sierra

Revert ARGV to {query}

Go back to {query}, as using $1 breaks VPN connections with spaces in their names #3

Fix hanging background processes on Sierra

• Fix hanging background processes on Sierra #2
• Notify user of available updates
• Cache Viscosity connections for duration of workflow session
• Remove Alfred 2 support