Merge tag '2.3' into development

Release 2.3

CHANGELOG.txt

@@ -1,3 +1,7 @@
+v2.3
+- Added shortened attribute names to use in templates
+- Handlebars "concat" helper added
+
 v2.2
 - Spanish translation added
 - Cohorts localization fix

system.json

@@ -2,8 +2,8 @@
   "name": "blades-in-the-dark",
   "title": "Blades in the Dark",
   "description": "Blades in the dark game system.",
-  "version": "2.2",
-  "minimumCoreVersion": "0.5.3",
+  "version": "2.3",
+  "minimumCoreVersion": "0.6.6",
   "compatibleCoreVersion": "0.7.2",
   "templateVersion": 1,
   "author": "megastruktur",
@@ -31,8 +31,8 @@
     }
   ],
   "url": "https://github.com/megastruktur/foundryvtt-blades-in-the-dark/",
-  "manifest": "https://raw.githubusercontent.com/megastruktur/foundryvtt-blades-in-the-dark/2.2/system.json",
-  "download": "https://github.com/megastruktur/foundryvtt-blades-in-the-dark/archive/2.2.zip",
+  "manifest": "https://raw.githubusercontent.com/megastruktur/foundryvtt-blades-in-the-dark/2.3/system.json",
+  "download": "https://github.com/megastruktur/foundryvtt-blades-in-the-dark/archive/2.3.zip",
   "packs": [
     {
       "name": "class",