add debug statements

Add lots of debugging statements before the next trial release to get
more information during cross-platform testing.
New CPAN release of Algorithm-AM - v2.39

    Added lots of print statements for trial release; need more info!
more print statements

Adding more print statements for another dev release.
New CPAN release of Algorithm-AM - v2.40

    More debug printing
more debug printing

`p` turned out not to be corrupted on failing systems. Debug print the
contents of `gangcount` and `grandtotal` as they are being updated.
This is for another trial release on the CPAN satellite!
fix incorrect carry call

Fix a bug introduced in 1c83533b where the wrong variable was
carried. Since `grandtotal` is updated, it should be carried, not
`gangcount`.

cherry-picked from master.
New CPAN release of Algorithm-AM - v2.41

    More debug printing
    Fixed big-int bug introduced in 2.40
fix uninitialized array element

gangcount[7] was not initialized in the code starting on 1127.
I believe that it was 0 on some systems and left-over garbage on other
systems, causing the failures in #2. We'll see if this solves the
problem.
New CPAN release of Algorithm-AM - v2.42

    More debug printing
    fix uninitialized array element
add/remove debug prints

Remove now unneeded debug printing statements and add some more for the
next release in pursuite of a solution to #2. Something weird seems to
be going on with right-shift.
don't pass reference to keys

Passing a hash ref to `keys` is a 5.14 feature, and is now considered
experimental, which causes it to produce warnings, which are fatal
with Test::NoWarnings.
Updated Changes
New CPAN release of Algorithm-AM - v2.43

    More debug printing
    don't pass ref to keys (experimental feature)
fix gangcount updating

The problem was that gangcount was updated from p for only the first
7 elements (0 through 6), leaving element 7 unchanged. This left
garbage in `gangcount[7]` on some machines, and limited the size
of storable numbers to 14 bytes instead of 16.
New CPAN release of Algorithm-AM - v2.44

    Fix gangcount updating (2.42 was correct)
pass package and version to XSLoader::load

Apparently not passing package and version to XSLoader is sort of a
newer feature, so for greater backwards-compatibility (and less fail
reports), add the two arguments in there.

Change the dzil package plugin so that there can be a version number in
the original file that is replaced when the build is made. This is
necessary for the XSLoader to work during development.
fix incorrect loop bound

The fix for #2 given in 7e66d3905 gave an incorrect bound for this
loop, which would access `gangcount[8]` if it ran.
add missing multiplication

Also related to the work for #2, the multiplication of the final
element of `p` and `gangcount` was missing, and so is added again here.
remove debug statements

Removed all of the debug statements used in tracking down #2.
Merge branch 'cross_platform'