- Prepared space for TFTD resource pack (just in game.cpp/h)

- Base can be build on land as well as in ocean (Base->isOnLand)
- Added new TFTD ruleset
- Added class for holding TFTD resource pack
- Added file with some ideas - not neccessarily mine ideas...
Merge branch 'master' of https://github.com/mdrska80/OpenXcom