Added a .gitignore file and placed *.swp in it for Vim files.
Reformatted the code. Code that was spread across multiple lines has
been joined into one, changed style of bracket placement by putting the
opening bracket on its own line, rather than trailing from the preceding
statement(s).

Removed variable(s) no longer referenced.

Greatly simplified the definitions of winning hands by implementing a
'mathy' solution. Rather than multiple properties defining a winning
hand, all of that information is now conveyed in a kind of formula
format.