clean cache after package build

.github/ISSUE_TEMPLATE.md

@@ -6,7 +6,7 @@ Hi there - thanks for filling an issue. Please ensure the following things befor
 - Add the `log/production.log` file from your system. Attention: Make sure no confidential data is in it!
 - Please write the issue in english
 
-* This textblock will be removed automatically when you submit the issue*
+* The textblock between "<!-- -->" will be removed automatically when you submit the issue *
 -->
 
 ### Infos:

contrib/cleanup.sh

@@ -11,3 +11,4 @@ rm app/assets/javascripts/app/controllers/_integration/clearbit.coffee
 rm app/assets/javascripts/app/controllers/role.coffee
 rm app/assets/javascripts/app/controllers/report.coffee
 rm app/assets/javascripts/app/controllers/report_profile.coffee
+

contrib/packager.io/after.sh

@@ -9,3 +9,6 @@ set -e
 
 # download locales and translations to make a offline installation possible
 contrib/packager.io/fetch_locales.rb
+
+# delete asset cache
+rm -r tmp/cache