calculate_intensity.R: New functions to compare enhancer regions

Signed-off-by: Charles Joly Beauparlant <Charles.Joly-Beauparlant@crchul.ulaval.ca>
calculate_intensity.R: new functions to calculate super enhancers

Signed-off-by: Charles Joly Beauparlant <Charles.Joly-Beauparlant@crchul.ulaval.ca>
calculate_intensity.R: added a new function -> parseRegionsStrand

Signed-off-by: Charles Joly Beauparlant <Charles.Joly-Beauparlant@crchul.ulaval.ca>