Backward Compatibility with Java 6

[Matt Parker]

This is a nice library. I wish it was compatible with Java 6.

I ripped out the source for the BitSet class, and added it to the library since the BitSet class in Java 6 is missing so many features.

At least it will compile now.

[Daniel]

The latest revision compatible with Java 6 is r40, but it is missing a couple of features such as big-endian byte[] conversions and query support with arbitrary precision: https://code.google.com/p/uzaygezen/source/list

You could also just cherry-pick the BitSet-related classes, namely BitSetBackedBitVector and BitSetMath, from that revision. Please let me know if you're interested in creating a branch for Java 6 compatibility.