Swig bindings/wrapper for rubby need to be moved into separate repo

[mikucionisaau]

Currently the bindings are removed as they cannot be compiled in their current state (see #19) and the best place for them is a separate repository.
The major issue is that the build system is obsolete and convoluted, needs to be rewritten from scratch, perhaps using cmake:

• the build scripts assume that UDBM is installed and udbm-config is available, we should use find_udbm.cmake or similar to discover all that.
• the swig Makefile is generated and then modified by a extconf.rb, perhaps we could achieve the same in cmake.