WIP: this is a first attempt at an updated release with new ITK etc.

Update 10/30/19: This release has a bug in antsRegistration that causes the iterations per level to be incorrect. An index offset shifts the number of iterations by one level, so if you specify -c AxBxCxD, the actual iterations performed will be BxCxDxE, where E is an undetermined unsigned integer. A fix is available here https://github.com/ANTsX/ANTs/commit/3d416475b296321dfe5e6cf905e05f197f4afb52.