Merge pull request #9 from olekw/master

Tweaks to hammer script
Use CEGUI 0.8.
Detect lua version flags for tolua++ automatically
Always redownload tolua++(no server support)
Fix incorrect Bash syntax in Lua check
Added the "Worlds" repo.
Set CMAKE_PREFIX_PATH for CEGUI build.
Use CEGUI 0.8.3.
Use Ogre 1.9.0.
Fixed issue with building OGRE without OIS.
Removed skstream.

As it's deprecated in favour of boost::asio.