http://www.sublimetext.com/docs/2/vintage.html
https://github.com/sublimehq/Vintage
If you're fortunate enough to be using Sublime on OSX, finding a shortcut is easy as:
1. Opening the help menu - "Command-?" (Command-Shift-/) 2. Entering search terms
Here's a screengrab of the process for your particular query (moving lines up): http://i.imgur.com/j226q.png
And here's a screengrab of CheatSheet (http://cheatsheetapp.com), a utility for quickly reviewing shortcuts in any OSX app, being applied to Sublime: http://i.imgur.com/HPUB4.png
Alternatives for these are available for other platforms, should you not be using OSX. Seek and you shall find :)