Final patch for 8014319: Faster division of large integers

[Tim Buktu]

Hi,

I hope everyone had a good July 4 weekend.
I updated the patch for 8014319 (i.e. phase 3 of the BigInteger work).
The patch still consists of three files; they can be found at

https://gist.github.com/tbuktu/1576025/raw/f93093a412eac86d8d81e03b8b9135eb827f2a84/BigInteger.java.phase3

https://gist.github.com/tbuktu/1576025/raw/f628f854491520de472a15fbcc2b6b751efe74e7/MutableBigInteger.java.phase3

https://gist.github.com/tbuktu/1576025/raw/4c3faad4cdebffbd77485482a1e61c9a7a475060/BigIntegerTest.java.phase3

There are only two changes vs last week's version. A missing @author tag
has been added, and common powers of two are now cancelled before
dividing numbers.
I realize the review of the phase 3 patch is about to begin, so I won't
make any more changes to the code.
Thanks,

Tim