Readme for filled nee files

Column 	data 			units
0		year	
1		day of year
2		HHMM
3		fjday
4		S
5		H
6		G
7		Temperature		oC	
8		Modeled resp		umol m-2s-1
9		b0
10		b1
11		b2
12		PAR			umol m-2s-1
13		Modeled psyn		umol m-2s-1
14		original NEE		umol m-2s-1
15		modeled NEE		umol m-2s-1
16		filled NEE		umol m-2s-1