Add Endian conversion BOOL to swap words internally for IEEE 754 Floats

[CTimmermans1]

For example, a 64 bit value of 110.1234 outputs from an external source
E4 14 1D C9 E5 87 5B 40

By adding a BOOL to allow for internal inversion, the input would be interpreted as
40 5B 87 E5 C9 1D 14 E4
Now correctly displaying 110.1234 as the output

[Skalman]

That sounds like a good addition. PRs will be accepted.