(#14 #15) Amount Painting

Update copyright information on files touched during this feature
implementation.
(#14 #15) Amount Painting

Addresses item 1 in https://github.com/hsoft/moneyguru/issues/15#issuecomment-33859904
with respect to simply splitting on the space character yielding
negative consequences.
(#14 #15) Amount Painting

Addresses item 2 in https://github.com/hsoft/moneyguru/issues/15#issuecomment-33859904
about vague comments.  Extracted relevant portion of commit message
and placed it into the comment.
(#14 #15) Amount Painting

Addresses item 3 in https://github.com/hsoft/moneyguru/issues/15#issuecomment-33859904
with regard to the testArrow code. This was just added to test the decorations
with the amount field painting.
(#14 #15) Amount Painting

Addresses item 4 and 5 in
https://github.com/hsoft/moneyguru/issues/15#issuecomment-33859904
with respect to no longer needing the ColumnDelegate class.

Also addresses item 6 in
https://github.com/hsoft/moneyguru/issues/15#issuecomment-33859975
with respect to renaming the class name to AmountPainter.
(#14 #15) Amount Painting

Addresses the design issue raised in
https://github.com/hsoft/moneyguru/issues/15#issuecomment-33302667
with respect to creating a user defined flag for indicating the
presence of a custom painter for the value of a cell at the
specified row and column.
(#14 #15) Amount Painter

Docstrings, comments, and stylistic changes as requested in
https://github.com/hsoft/moneyguru/issues/15#issuecomment-33859904