Update install.sh and uninstall.sh, fix smalls typos.
Move npc folder into usr/. Evenif using it as opt/ the layout is set to
be turned into a proper module.
- Removed any remaining TXT and SQL references from files.
- The 'make sql' command is now replaced by 'make server'.
- Removed account.engine feature as it is no longer needed.
- Moved login and IP ban configs to inter_athena.conf.
- Cleaned up cmake files.
- Miscellaneous clean ups.
