dvhcalc

Refactored bounding & resampling set up code to only execute if conditions are met.
Fix a bug where the resampled LUT was not calculated correctly for DVH interpolation.

dvh

Remove the test for existence of ContourImageSequence in GetStructureCoordinates.
(#81) [Gabriel Couture]
Utilize integer division when generating a background for an image.
Return a string for the patient's name as PersonName3 cannot be serialized.
Fix a bug to return a referenced FoR if the FrameOfReference is blank.
Fix a bug in GetPlan where the wrong object names were used. (#43) [gertsikkema]
Ensure that Rx Dose from RT Plan is rounded instead of truncated.
Account for holes and bifurcated structures for structure volume calculation.
Implement structure volume calculation using Shapely.
Fix window calculation if not present in header.
Add checks in max, mean, min and dose_constraint for case where counts array is empty or all 0's. (#96) [Nicolas Galler]