Merge pull request #41 from learn-more/master

Sortable headers in serverbrowser
OpenAL doesn't have to be linked because it's linked at runtime
Merge branch 'master' of https://github.com/yvt/openspades
* Spade/block's reach fixed
Easier to place block under the feet
Faster dig (the same speed as the original AoS 0.75)
Changed version number to 0.0.8