- added definitions _DEBUG and NDEBUG to tune system-specific stuff
- reduced the build requirements (Pentium 4 was a bit too much)
- changed build settings and project structure to match the vs8 projects
- corrected some vs8 inconsistencies
git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@10055 54d463be-8e91-2dee-dedb-b68131a5f0ec