Lobster-codebeamer supports items without summary

Item summary text guard has been removed

Resolves #47

CHANGELOG.md

@@ -4,21 +4,17 @@
 
 ### 0.9.18-dev
 
+* The `lobster-codebeamer` tool now allows items without summary
+
 * The `lobster-codebeamer` tool now uses codebeamer api v3.
   Please note that the api v3 returns the value "Unset" for a codebeamer
   item status if the status is actually empty. The api v1 did not return
   any value at all for an item with a missing status. This means that the
   resulting lobster file will now contain "Unset" as status information,
   too, instead of `Null`.
 
-### 0.9.18-dev
-
-
-
 ### 0.9.17
 
-* The `lobster-codebeamer` tool now allows items without summary
-
 * The `lobster-python` tool now adds the line number to the function
   identifier. This supports situations where different functions have
   the same name