Enhancements to SaveRKH

[Russell Taylor]

Following meeting with SANS group, we need to improve the way we save their data (the SaveRKH algorithm). They want:

• More information in the header
• The ability to append datasets to an existing file
• The writing out of 2D data moved into this algorithm

[Russell Taylor]

(In [2859]) SaveRKH modified to append to an existing file by default, to have more information in header (workspace title now includes more detail when reading from a raw file) and to cope with 2D data as well as 1D. As a consequence, the writing out of data has been removed from Qxy. The replaceAxis method on MatrixWorkspace allows an axis to be 1 longer than the old one to allow 'bins' on the vertical axis. Re #776.

[Russell Taylor]

(In [2861]) Fix Linux build. Re #776.

[Russell Taylor]

(In [2863]) Move where a workspace title is stored in a NexusProcessed file onto the title field. Should fix test crashes. Re #776.

[Russell Taylor]

(In [2864]) Minor change to allowed property values in LoadRKH. Re #776.

[Martyn Gigg]

(In [2865]) Added a file validator to SaveRKH so that a browse button is generated in the Qt dialog. Re #776

[Nick Draper]

Moved as part of iteration 18 end

[Stuart Campbell]

This ticket has been transferred to github issue ​1624