Rename A13-olinuxinom to a13-olinuxinom

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Clarify needed Fedora version

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Update build-image.sh for dynamic loopback

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Update README for Fedora 20

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Adjust root partition start for Fedora 20

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Update tag

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>