FIX: Weapons list in "Ships & Weapons"

Weapons list displayed either only drones or weapons AND ships; this fix
uses an items categoryID to completely filter out ships
FIX: Installer incompatibility with new database

The installer was missing some changes to make it compatible with the
latest DB update and the new update process
Changed link to evekb.org in install step 8 template
Bump version to 4.0.7.0