Ting's APNs are included in CyanogenMod 11 by default now! This started with the nightly builds about 2 days ago.
To start using the Ting APN, go to
1. Settings>Mobile Networks>Access Point Names
2. Open the menu (three dots), and choose "Reset to default"
3. After it has reset, scroll down, and press the radio (circle) button next to Ting
You will not lose any data in this process except custom APNs you have configured. If you are setting up a new device, you can skip the reset to default step. Make sure you are running a nightly from the last few days (specifically, anything from 20140917 and on, not including the M10 release) and that you don't flash any APN zips after upgrading to fully take advantage of this.
Also note that this does not affect Google Hangouts SMS. You'll still need to manually configure the APNs in Hangouts, but not for the system overall (like the default messaging app).