updates to unite - backbone.R

backbone.R
df2=data.table(df2,key=c("chr","start","end","strand") )
[df2=data.table(df2[,c(1:3,5:7)])]
Basically include strand here.

zzz.R
Add a zzz.R which is read on load.
.readTableFast only reads 5 rows, and at times does not determines
classes properly (enable full table read).

annotate.R:
change column 13 to id, more reliable.