Flashing guide
HALtAs Droidian now not fully working, I'm not providing anything that will be flashed directly to phone. You need microsd to continue installation.
1. Download Droidian .zip, extract rootfs.img from it.
2. Place rootfs.img on sdcard.
3. Download vendor image and place it on sdcard too.
4. Boot to twrp with sdcard inserted. Unmount it from "Mount" menu.
5. Flash adaptation .zip package, sdcard should be unmounted.
6. After flashing .zip, reboot to twrp.
7. Resize rootfs.img with next commands: e2fsck -fy /external_sd/rootfs.img
resize2fs /external_sd/rootfs.img XG where X is number
8. After that, go to fastboot, and boot image-new.img by typing: fastboot boot image-new.img.
9. Congratulations, you should now boot to droidian.
NOTE: Some ROMs, such as aospa, may not allow to boot droidian boot image, to boot it, backup your vendor_boot, and flash vendor_boot from downloads.