[BUGFIX] do not delete unliked, but referenced records
[FEATURE] migration of page templates with static data structure.
Merge pull request #53 from WebentwicklerAt/master

[BUGFIX] do not delete unliked, but referenced records
Merge pull request #56 from WebentwicklerAt/staticpageds

[FEATURE] migration of page templates with static data structure.
[TASK] do not insert empty 'insert records' elements of referenced but deleted source elements
Merge pull request #57 from WebentwicklerAt/master

[TASK] do not insert empty 'insert records' elements of referenced but deleted source elements
[FEATURE] migration of fces with static ds fixes #55