Cycle test for 32-bit unsigned integers.

Splitting up signed and unsigned tests.

See #256.
Cycle test for little-endian 32-bit floats.

See #251.
Cycle test for big-endian 32-bit floats.

See #251.
Cycle test negative single precision floats.

Closes #251.
Cycle test for little-endian double float.

See #252.
Cycle test of big-endian double float.

See #252.