refs #8557 Two questions to 2 suspicious places of code

Two places found after code review which look like wrong. Questions to code were placed after //!!! mark
Merge branch 'master' into feature/8557_SNSvsISIS
Refs #8723 add LoadIsawSpectrum algorithm
Refs #8723 add LoadIsawSpectrum algorithm
Refs #8816 add predict peaks to SCD interface
Refs #8816 move predictPeaks after UB
Refs #8816 add argument
Refs #8816 make params visible
Refs #8816 fix dspacing params input
Refs #8816 longer interface and enable parameters by default
Refs #8281 Tidy up the S(Q,w) interface on C2E.
Refs #8281 Hook up data selector widget to interface.
Refs #8281 Fix tab order for binning input on S(Q,w) interface.
Refs #8723 test for reading vanadium spectrum
Refs #8723 correct text for wiki
Refs #8723 3 ways to specify instrument
Merge remote-tracking branch 'origin/master' into feature/8281_sqw_interface_tidy

Refs #8281

Conflicts:
	Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/ConvertToEnergy.ui
re #9014: Bring Reducer and ReductionSingleton to SANS folder
re #9014: Bring reduction steps to sans_reduction_steps

While moving, I've tried to remove those methods and attributes that we
were not using at all. It might have more, which must be investigated in
another opportunity.
re #9014. Bring Instrument to isis_instrument