fixed two bugs (Issues on github). 
ArgumentError in workerprocess and ZeroDivisionError in MakeScaffolds.
this version is 1.0.4.3
Fixed bug with importing matplotlib on cluster. removed some unused code
Fixed issue with matplotlib when running on cluster. Small version
confusion with 1.0.4.3. Pushing this as version 1.0.4.4
Merge branch 'develop'. Latest stable version is 1.0.4.4.