Adding jdoc to Reducible (needs more polish)
Add default implementation for take/skip/...
Updating roadmap
Vagrant environment including all dependencies
Reworked Rakfeil build script into irb based tool

After having failed to see why I couldn't get fast startup times with
rake and nailgun (apparently reauire 'ant' eats up 2 sec by itself),
I gave up and took another approach: I reworked the build script to
be instead launched once only inside irb. Rake tasks can be invoked
directly from inside irb. It is quite rudimentary but it is working
fine for now and finally bring interaction speed to the tdd level.
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