Bugfix: Updated API Base URL in installer

Updated the API Base URL in installer (Step 5) to api.eveonline.com
(api.eve-online.com as been disabled). This fixes Pilots/Corps/Allys not
being found during installation at step 5.
Added DB updates for inventory flag conversion

Added update scripts for converting legacy item flags in kb3_items_dropped
and kb3_items_destroyed to CCP inventory flags
Fix: Slot conversion scriFix: Slot conversion scripts for manual killmails

Added the ability to the update scripts for slot location to convert items
from manually posted mails

Added the ability to the update scripts for slot location to convert items
from manually posted mails
Enhancement: Check file permissions before update

The auto updater now checks for write permissions for every file affected
by the update before touching anything. If file permissions are not
sufficient, the updater tries to change them. If that didn't work it fails
with a list of all files which need to be set writeable by the user in
order to complete the update.
The update will not be applied partially anymore.
Bugfix: Check file permissions for files to delete

The auto updater now correctly checks for write permissions of all files
listed in cache/todelete.txt
Merge branch 'salvoxia' of https://github.com/evekb/evedev-kb into salvoxia