JSON generation Profiling Interface

[twittidai]

@twittidai We need to add this interface ASAP to enable the visualisation of LAIK application.

In addition, current informations should be embed into the profiling:
FLOPS
Cache-Misses
Communication waiting time
etc.

[weidendo]

We can start simpler: "number of indexes processed per second"

[twittidai]

I'm on this in the next weeks, since the Visualizer is now working and needs data :)