Provide man(1) pages #293

Currently there are no man(1) pages that document the SmallBASIC interpreter, its' CLI options (for the console version), etc. This would be good to have for each binary that can be built for SmallBASIC (console, web, GUI, SDL, etc.). The impetus came from #217.

man(1) pages for binaries associated with

• console
• SDL
• GUI
• web