Don't need to use "and" when it is equivalent to ";"
Merge pull request #7 from deivid-rodriguez/master

Hmm. Thought i had fixed that when I sent the instructions. Must not have pushed it.  Well, okay. Done now
Split out arrange_rows and arrange_columns. Try to make COPYING consistent.
Backwards compatibility from Martin Davis. Thanks, Martin!
Doc arg parameter omission
compute_rows_and_colwidths -> min_rows_and_colwidths
Small code tweak.
arrange_rows -> arrange_by_row; arrange_columns -> arrange_by_column
DRY min_rows_and_colwidths tests.
0.8.9 in advance of 0.9.0 in advance of 1.0.0