Added support of integer columns to Nexus table workspaces

This is needed to enable peak data to be saved in a MantidPlot project as required in ticket re #4073

Integer data is stored using the NX_INT32 info type.

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>

.gitignore

@@ -139,3 +139,5 @@ Thumbs.db
 
 # Folder config file
 Desktop.ini
+
+/Code/Mantid/Build/CMake/OutputBinaryTo.cmake
\ No newline at end of file