The SANS GUI now has a "Manage Directories" button and it handles multi-period files better too. refs #2145 and #2146

Load() now has an extra optional property, the entry number to load in a multi-period file. Currently only ISIS Nexus files support this re #2209

Ensure that single valued workspaces can be used in binary operations regardless of whether they are lhs or rhs. There was a small bug with multiply that meant they would fail on the lhs. Also ensured that the Python binary overloads provide better information if they fail. Re #2215

Refs #2190: The command line output of make is displayed in stdout (still want to add it to the GUI part too though).

Temporarily disable multithreading that seems to be causing random test failures in release. Re #1925

Refs #2023 Created DivideVanadium algorithm because python code for division was too slow in SNSSingleCrystalReduction