Ok, I'm getting to the same point as your dmesg log shows, it doesn't boot up just hangs after it mounts the filesystem. I tried a USB keyboard with OTG and it worked fine so if you can get it back to where it shows a login prompt you might be able to plug in a keyboard and login with that.
http://imgur.com/XUtb5aH
http://imgur.com/a/u0EM4
I don't have a usb keyboard so can't try that, here is my build if you want to try.
ubuntutouch_cm-10.1-20131026-UNOFFICIAL-quincyatt.zip - 31.90 MB
I recorded the screen so I could see what was on the screen before it launched the terminal login screen from my first attachment.
Not sure if it gives us any information to fix something or not.
Troy