Correcting import of MultiTE / multiTI data

(Siemens_FME_Hadamard)
This is what we have now on ASL.json:

"PostLabelingDelay":[1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4],
"EchoTime":[**0.01384,**0.04152,0.0692,0.09688,0.12456,0.15224,0.17992,0.2076,**0.01384,**0.04152,0.0692,...]

But, as Echo time repeats every 8 TEs, the PLD should look like:
PLD: [1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3.... etc]

Also, we might need to change the merging procedure. Previously, we stored PLD1+TE1,PLD2+TE1,PLD3+TE1 etc. We want also to store the NII as PLD1+TE1,PLD1+TE2,PLD2+TE3 etc. Because in BIDS we say that we want to keep the strictly acquisition order.

Release note

MultiTE import puts TE before PLD in the time series and corrects the JSON output