Use a configure task and extension tasks to build ruby-ecore.
Added a publish task.
Added an RDoc task.
Removed RCS-style IDs.
Fixed mkdir_p call.
Create target directories if they don't exist.
Added first ecore_con bits.
Added support for RUBYARCHDIR.
Build system fixes.
Fixed the install target.
Made libdir configurable.
Replaced the autotools setup with a Rakefile.