Revert "Merge pull request #360 from doleiynyk/2013-12-03_Saving_items_after_exception_fails_fix"

This reverts commit 1e4aa820ea2342a822613c4f80e07ac9d954c09b, reversing
changes made to 77e4b99f32220a4017e438a053b2c3bf7977e06b.
Improves extension template
Provided proper formatting of list of error messages
Merge branch 'master' of https://github.com/nsendetzky/arcavias-core