Upgraded express to 4.x
Jasmine tests introduced

Integrated with Jasmine, spec contains jasmine tests now. Clean up in
repl_manager.js following the creation of repl_manager.spec.js. Changed:

.clear => %reset to better match python
% => %inline

Updated README.md and docs
Syntactic sugar for d3 integration

Introduced some syntactic sugar for d3.js integration:

%init_d3 - import d3 dependecies

After this magic command one can run d3Container() to create a
container object that has .render() method in it. Help and README.md
updated.
Separated repl scripts from magics

Splitte repl_scripts.json into repl_scripts.json and repl_magic.json
which allows adding new magics without modifying anything but
repl_magic.json. Removed old unwanted printing, added %reset example
scrapbook.
Cleanup tests and examples.

* Moved reset.json scrapbook into rest_context.json and added comments.
* Updated jasmine specs.
* Improved README information on running tests.
Merge branch 'jasmine'