Converter task for haarcascade Classifiers

Here is the result of what was discussed on  #92. It seems to be working fine, working without problems here. The tests running in travis  for the [converter](https://github.com/cirocosta/gulp-converter-tjs) are not passing but everything is ok in my machine (which is strange ... i'll setup vagrant and then debug it in a clean env) .

`gulp build-data` will generate `tracking.ViolaJones.classifiers.__CLASSIFIER_NAME__=new Float64Array ...` files (`/build/data`).

The sandbox was also modified to use the files with their new names (closer to the originals from opencv repo)

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it seems like travis is having problems building node-expat (for parsing xml very fast) with node .11 :cry: