Moving handlers to subdir
Adding new files.
Splitting handlers into different files.

I have also created a top-level utils.py for notebook related stuff
Adding __init__.py
Fixing url join problems.
Removing debug message.
More work on the handlers
Reorganizaing the server side of the notebook.
Updating import statements after moving notebook files around.
Renaming api handlers and moving FileFindHandler into base handlr.
Renaming templates to match other names.
Moving base ZMQ handlers to base/zmqhandlers.py.
Removing dup import.
Refactor notebookapp __init__ method.
Updating tests for refactor.
Updating components to latest commit.
Fixing minor import error.
Moving web services into a subdir.
Fixing imports for frontend tests.
Updating imports.