[Hedgewars] New Mission Campaign

by Periklis Ntanasis for openSUSE

A new Campaign Mission that will teach the game play through a funny way to the players. The Campaign story will be about the travels of a spaceman through the outer space. Players will be able to play certain stages of the campaign in a not specified order and regarding their accomplishments new stages will be unlocked. Coop stages is likely to be added. In order to implement the above, some changes may be required in the underlying layers(LuaAPI,Animate.lua etc.).