ComplexCF accepts double precision values without error

[Joshua Anderson]

Of course, it computes nans because doubles interpreted as floats don't make sense.

ComplexCF needs to check the data type of its input to make sure it is the correct type.

[Matthew Spellings]

Added numpy type checking for values arg of CorrelationFunctions

fixes #27

→ <<cset c02760af62e9>>

[Eric Harper]

Added numpy type checking for values arg of CorrelationFunctions

fixes #27

→ <<cset b854949ef082>>

[Eric Harper]

Added numpy type checking for values arg of CorrelationFunctions

fixes #27

→ <<cset b854949ef082>>