Merge pull request #10 from stuarteberg/master

Added launch script for ilastik watershed gui.
ilastik: Updated to latest tag (flyem-20130207)
ilastik: Updated tag for latest bugfix related to absolute vs. relative path args.
boost.cmake: Added several more components.
Added chatty C++/python logging library.
Added lemon graph library.
Added cylemon (python bindings for lemon graph library implemented with cython).
ilastik-gui: Added chatty and cylemon as dependencies, and added carving workflow launch script.
- cylemon is needed for the carving workflow
- chatty isn't really needed for ilastik per se, but will probably be needed in future workflows.