First implementation of services and basic injection. Not working with CLI for now.

docs/roadmap.rst

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+Detailed roadmap
+================
+
+Next...
+:::::::
+
+* Release process specialised for bonobo. With changelog production, etc.
+* Document how to upgrade version, like, minor need change badges, etc.
+* PyPI page looks like crap: https://pypi.python.org/pypi/bonobo/0.2.1
+* Windows break because of readme encoding. Fix in edgy.
+* bonobo init --with sqlalchemy,docker
+* logger, vebosity level
+* Console run should allow console plugin as a command line argument (or silence it).
+* ContextProcessors not clean
+
+Version 0.3
+:::::::::::
+
+* Services !
+* SQLAlchemy 101
+
+Version 0.2
+:::::::::::
+
+* Autodetect if within jupyter notebook context, and apply plugin if it's the case.
+* New bonobo.structs package with simple data structures (bags, graphs, tokens).
+
+Plugins API
+:::::::::::
+
+* Stabilize, find other things to do.
+
+Minor stuff
+:::::::::::
+
+* Should we include datasets in the repo or not? As they may change, grow, and even eventually have licenses we can't use,
+  it's probably best if we don't.