add python header

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add caja version

Signed-off-by: Mattias Andrée <maandree@operamail.com>
1.5.0 and 1.6.0 uses python 3

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add python dependency

Signed-off-by: Mattias Andrée <maandree@operamail.com>
can build python-caja-1.5.0

Signed-off-by: Mattias Andrée <maandree@operamail.com>
1.2.0 and 1.4.0 requires python-mate

Signed-off-by: Mattias Andrée <maandree@operamail.com>