Check out the Wiki. I think you will find your answer there.
Did not find anything usefull
A simple way would be to masquerade the network if you dont mind having a natted output. This will effectively hide your network behind the router but still allow all outgoing traffic.
Currently the last rule in your list will drop ALL traffic in the forward chain, in and out, so the result you are getting is expected.
Have had that ideer in my head, but i wanted it on it's own IP free of NAT...
But how do a block all indbound and only allow trafic in that i want open? and allow all outbound trafic?