Add Muon DKT for non-zero magnetic field

[raquelalvarezbanos]

This ticket is blocked by :

• TRAC9556

In ticket http://trac.mantidproject.org/mantid/ticket/9556 the DKT for zero magnetic field was implemented. Update the code corresponding to HKT() to allow positive fields. The function to implement is described in the documentation.

[raquelalvarezbanos]

This issue was originally trac ticket 11086

[raquelalvarezbanos]

http://trac.mantidproject.org/mantid/raw-attachment/ticket/11086/EMU00020888.nxs
(uploaded by @raquelalvarezbanos on 2015-03-26T12:27:31)

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http://trac.mantidproject.org/mantid/raw-attachment/ticket/11086/EMU00020889.nxs
(uploaded by @raquelalvarezbanos on 2015-03-26T12:27:38)

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http://trac.mantidproject.org/mantid/raw-attachment/ticket/11086/EMU00020890.nxs
(uploaded by @raquelalvarezbanos on 2015-03-26T12:27:46)

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