Useful script for showing status of data submodule
Fixed GCC 4.6 compilation
Travis change from #148
Revert "Travis change from #148"

This reverts commit 5f1c202a6b35a0b5c102d9ab6b8bf1e730ce5a03.

Reverting change because we still need to check GCC 4.6 compatibility.
Added option "zoom=x;y;z" to CreateObject in mission files
Added interface button for AlienSpider explosion
Issue #142