bichen: added a script to randomly split train-val set.
bichen: added a script to randomly split train-val set.

On branch master
Your branch is up-to-date with 'origin/master'.

Changes to be committed:
new file:   data/random_split_train_val.py

BichenWuUCB/squeezeDet,fyhtea/squeezeDet-hand,getnexar/squeezeDet,BichenWuUCB/squeezeDet,goan15910/ConvDet,goan15910/ConvDet,fyhtea/squeezeDet-hand,BichenWuUCB/squeezeDet,goan15910/ConvDet