-Fix a compilation issue with OHashTable iterators.

git-svn-id: http://odamex.net/svn/root/trunk@4319 b0bcef46-2027-0410-bd56-ab726e9a1d04
Fix include issues


git-svn-id: http://odamex.net/svn/root/trunk@4322 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Refactor WAD and DEH file loading to commonize WAD loading at startup and when changing to a different set of WAD files.

git-svn-id: http://odamex.net/svn/root/trunk@4323 b0bcef46-2027-0410-bd56-ab726e9a1d04