To unlock your device
1. cd to platform-tools
2. Reboot to the bootloader - adb reboot bootloader
3. Unlock your device* (with fastboot tool type): fastboot oem unlock
*You will have to accept and erase all the user data on the tablet.
*You must run this as sudo in Linux
Credits to FadedLite (very similar steps)
Figuring out the rooting next