Camera [Q] Enabling Camera2 on Xperia T running OmniROM

I am running OmniROM (omni-4.4.4-20140826-mint-NIGHTLY) on Xperia T, and flashed latest GApps.
Everything is working fine, but I only can see the Google Camera App, which does not offer much functionality. I heard of another camera app (AOSP Camera2) which would have more features. How to enable this camera app?