Improve API.
Improve API.

* subversion/bindings/swig/ruby/svn/ra.rb (Svn::Ra::Session.open):
  Use Svn::Core::Config.get as default config value.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion