First import.

Include :
- "treemap.html": the core of the treemap
- config.json: a sample configuration
- "libs" directory: dependencies (d3 and jquery). Maybe there is a nicer way to get theses libs ( treemap.html should link them directly by a publi URL on the web ? Or it can be included using GIT submodules ?).
- "sampledata" directory: a sample dataset taken from http://vincentarelbundock.github.io/Rdatasets/csv/vcd/Baseball.csv