Updated Changelogs

Fixed a bug introduced with the plugin refactoring: some tool menu it…

…ems were not functional.

Updated Changelog dates

Updated debian changelog.

Fixed version in Changelog

Fixed KLayout#102 (Potential issue while upgrading from .25.1 to .25.2)

The reason was that for 0.25.1 "macro-editor-font-size" was allowed
to be an empty string (the default). Which meant: take default application
font size. In 0.25.2 this now was required to be a number and 0 was
the default for "auto" font size.

Two changes:
 - The default is back to empty string ("0" is still allowed as default)
 - The application was made safe against broken configuration files: an
   error is printed to the log, but apart from that the application
   will work (the configuration value is ignored however).

Updated changelog.

Another fix for Ruby/Python-less builds.