Completed 16 bit double encode logic
Renamed to $signifcand for clarity
Updated dockblock for significandFits()
Renamed to significand for clarity
Updated significandShrink() docblock
Aligned some comments
Added to decodeFloat_16 to test for negatives
Removed floor logic for encodingIntegers, 64 bit encode doesn't work as is
Forgot to multiply bit count by 8, fixed it
Commented out encode UINT 64 test for now
Commented out encode Super Large int test for now
Added a zero length check to significandFits
Added an exception if there are bytes left over after decoding is complete