Bug fixes and minor API improvement

* parser-toolkit 7b5fc7a...6634ecc (1):

    commit 6634ecc7176dc83cbf5cc48f58a16a62a7741bc6

        Added RtdData.isStringOnly to find out whether a call to toString will yield correct results.

* sweble-wikitext 6d47233...9baecfe (1):

    commit 9baecfe9dd2060c643647cab8efbf514a29aa6a1

        Bug fixes to swc-parser-lazy and swc-engine

        - TagExtensionPre adds RTD information to generated WtXmlElement
        - TreeBuilder adds RTD for closing element on table nodes (table, tr, td, ...)
        - Parser SemiPre rules now also ignores lines with "<caption" in it

* sweble-wom f8d6ffa...0b428b9 (1):

    commit 0b428b96f083d400ae1df811022928d753b32cef

        Calling ChildManagerBase.*NoNotify() methods also no longer calls acceptsChild, acceptsParent and childAllowsRemoval