avoid time diff computation on the SQL side to prevent "1690 BIGINT UNSIGNED value is out of range" error

fix gh-33
Merge pull request #39 from thomasleveil/fix/33

avoid time diff computation on the SQL side to prevent "1690 BIGINT UNSI...
PEP changes
description of the Weapons and images

Issue #41 Enhancement
Here my Weapondescriptions and the the most new weapons inclusive Second Assault Weapons.
Since DICE make it easier to see which Vehicle killed you, i include that as well.
Weapon and Vehicle Images

here the Weapon Images and Vehicle Images for Battlefield 4
Shows the Weapon Description

With this little changes you can see the Weapon Description of each
Weapon.
Typo

Typo in Mapnames of Naval Strike Fixed
Descriptions on Weapons and Vehicles

write some more descriptions for Weapons and Vehicles
Merge remote-tracking branch 'ostoffel/master' into release-3.1.0
Closes #42 pull request from ostoffel