Refs #8116 Refactored FlatAbs
Refs #8116	Added sources for further information on technique.
Refs #8116 Refactor code into functions
Merge branch 'master', remote-tracking branch 'origin' into feature/8116_fltabs_code_tidy
Refs #8116 Move calculation of tsec.
Merge branch 'master' into feature/8116_fltabs_code_tidy

Conflicts:
	Code/Mantid/scripts/Inelastic/IndirectAbsCor.py

Refs #8116
Merge remote-tracking branch 'origin/feature/8116_fltabs_code_tidy'