[IDA] - CalcCorrections - replace Fortran FlatAbs program with Python version

[mantid-builder]

Original Reporter: Samuel Jackson

New ticket from Spencer:

In file IndirectAbsCor.py there is a new set of routines to run FlatAbs - line 208 onwards.
Lines 125-6 are also changes.
Importing Fortran program fltabs has been removed from line 7.

'''Testing'''

Should give the same results but with a slightly different accuracy.

After verifying the Fortran programs fltabs_win*.pyd can be removed from the system.

[mantid-builder]

This issue was originally trac ticket 7976

[mantid-builder]

http://trac.mantidproject.org/mantid/raw-attachment/ticket/7976/IndirectAbsCor.py
(uploaded by Samuel Jackson on 2013-09-18T14:50:52)

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http://trac.mantidproject.org/mantid/raw-attachment/ticket/7976/ISISIndirectAbsCor_FltAbsTest.nxs
(uploaded by Samuel Jackson on 2013-10-10T09:15:36)

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http://trac.mantidproject.org/mantid/raw-attachment/ticket/7976/Test_FlatAbs.py
(uploaded by Samuel Jackson on 2013-10-10T09:16:53)

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