Enhancement: cURL support for SimpleCrest fetcher

Added configurable cURL support for SimpleCrest fetcher.
Use of cURL or file_get_contents can be configured. If cURL
is not available, the fetcher automaticall falls back to
file method.
Increased HTTP timeout to 45s for kills with many involved parties.
Fix: Changed default method to cURL for SimpleCrest

Changed the default HTTP method to curl.
Enhancement: cURL support for SimpleCrest fetcher

Added configurable cURL support for SimpleCrest fetcher.
Use of cURL or file_get_contents can be configured. If cURL
is not available, the fetcher automaticall falls back to
file method.
Increased HTTP timeout to 45s for kills with many involved parties.
Fix: Changed default method to cURL for SimpleCrest

Changed the default HTTP method to curl.
Merge branch 'salvoxia' of https://github.com/evekb/evedev-kb into salvoxia
Fix: Add corp name in front of control towers/mods

Fixed a bug in IDFeed/API import that identified Control Towers as
involved parties as NPCs and therefore ignored kills with towers as the
only involved party if configured to ignore NPC only kills.

Side effect of this fix is that the pilots representing the towers in the
database are now called <corp> - <tower> once again.
Enhancement: Added more attributes to itemlist

Added/Updated attributes in class.itemlist.php:
* added the real tech level
* renamed old tech level to metalevel
* added item volume
* added item mass

Thanks to sparky41 for this update!
Fix: CrestParser, NPC kills and permanent deletion

Fixed an issue with the Crest Parser calculating a wrong kill hash for
kills with faction NPCs as involved party, possibly resulting in an SQL
error.

Also fixed an issue when trying to post permanently deleted kills via
CREST, works now correctly.
Enhancement: Added "ignore NPC kills" option to IDFeed

Added a separate "ignore NPC kills" option to IDFeed.
Can be configured in ACP -> Feed Syndication (section "Options").
IDFeed class now distinguishes between API import and IDFeed and uses the
appropriate configuration setting.
Updated CCPDB and Killboard version

CCP DB Version is now Kronos 1.0 (98431)
Killboard Version is now 4.2.1.0
Updated CCPDB package files to Kronos 1.0