Commented out use of SolidAngle in MedianDetectorTests as it can give false (good) results for pixels. refs #2596

Fixes bug where workspaces for the sample had names including the word 'can', now only can workspaces (entered in the bottom line of the GUI) are labelled can re #2219

In the ISIS SANS Python interface it is possible to alter the name of the output workspace, beam centre finder is being ported to the new framework and there are two bug fixes re #2219 and #1811 

Refs #2320 Add masking to MultipleScattering and SaveGSS.  Test of dataset without instrument OK now.

Refs #2583: TestViewer now loads the log of each test suite and saves it in the results, and shows them.

Refs #2584: Adding the use of a MANTIDLOGPATH variable to override the log file path at run-time; test.

Refs #2584: Can specify alternative log file path under Linux. Logging configuration should be picked up from Mantid.user.properties better than before.

Fixes #2588: Call to release memory only if above a certain threshold of memory used. Should save a couple of seconds vs calling it each time.

File widget has new options to have a small browse for file icon instead of a button or neither one re #2337