Otherwise the class files for IDL files that were removed still end up
in unoil.jar and may cause JunitTest to fail with
"binaryurp::Unmarshal: type with unknown name: ".

Write dummy targets for included files, so the incremental build does not
break with "No rule to make target" if the included file is removed.

* non-escaped (not doubled) quotes in quoted strings are regarded as broken
  representation and are taken literally, only a quote followed by a separator
  ends a field. If not being a separator themselves, trailing blanks between
  the ending quote and the separator are ignored, complementary to leading
  blanks between a separator and a quote.
* quotes in a non-quoted string are taken literally

This reverts commit 7ad0f3a4.

in ScDPItemData::DisposeString

helptext field has not been in use for a while, so we can
use that to hold the x-comment

speed up rebuild of sc

Commit 0c80ad06 broke MacOS X builds
because of this discrepancy. It would be easy to accept both, but I
think it is better to be consistent with gbuild.