- add NsfArgumentError() to stub interface, since this might be used by c packages using the interface generator - add mong::json to the interface - bump version number for mongo interface to 0.4.
build system: - don't call genstubs from configure, since Debian does not seem to have genstubs.tcl installed. Now, we pre-generate the stub files for tcl8.5 and tcl8.6 and copy the "right" version depending on the configured version.