EMD metric is not working

[dberga]

The function "emd_hat_gd_metric_mex" returning 0 as score. Using default parameters.

[cvzoya]

Please try to download and compile FastEMD from: http://www.ariel.ac.il/sites/ofirpele/fastemd/code/

[dberga]

That was not the problem.
When energy is too big and im1 and im2 are integers, when dividing by a big number (ex. 6000) we get values that are rounded to 0 (ex. "0.16" is rounded to 0). We need to cast values to doubles before calling the energy to avoid calculating 0 values on P,Q. Therefore to avoid the 0 score issue. Now I get correct EMD scores.

Here is my pull-request
#6