Latest language files from Crowdin

Latest files from Crowdin

Weekly release 2015-06-25

Merge pull request zaproxy#1671 from psiinon/plugable-db2

Tweaks to make it easier to support generic sql dbs in add-ons

Tag 2.4.0 (from branch 2.4 r6044).

2.3.0 release

Created the tag 2.2.2 from branch 2.2 (r3684).

Created the tag 2.2.1 from branch 2.2 (r3589).

Created the tag 2.2.0 from branch 2.2 (r3556).