Improved Input class.

getMembers etc don't have input parameters
	modified:   src/Data.cpp
	modified:   src/Selectors/Analog.cpp
	modified:   src/Selectors/Clim.cpp
	modified:   src/Selectors/Member.cpp
	modified:   src/Selectors/Performance.cpp
	modified:   src/Selectors/Super.cpp
	modified:   src/Drivers/Comps.cpp
	modified:   src/Variables/Precip24.cpp
	modified:   src/Variables/Precip6.cpp

Bug where no bool was returned in readCore
	modified:   src/ParameterIos/Flat.h

No cdf returned in getCdf
	modified:   src/Uncertainties/DiscreteOnly.cpp
Code cleanup. Forgot to a few bug fixe from last commit.

Didn't add the bug fixes to src/ParameterIos/Flat.h.
	modified:   ParameterIos/Flat.h