dynamic_difference_network: Compute a dynamic difference network
In pcahan1/epoch: Dynamic GRN reconstruction from single cell RNA-Seq data

Compute a dynamic difference network

dynamic_difference_network(
  edgeDF,
  epochs,
  condition,
  type,
  diff_thresh = 3,
  condition_thresh = 6
)

`edgeDF`	the result of running edge_uniqueness
`epochs`	list of epoch gene assignments
`condition`	condition of interest, should be one of the treatment (aka network name) or column names in edgeDF
`type`	"on" or "off" specifies either finding edges that are active in the condition network but off others or inactive in condition network but active in others
`diff_thresh`	edge difference threshold to determine if edge is uniquely on or off
`condition_thresh`	edge weight theshold in condition network to keep or filter out in difference network