Prepare stack-mode for melpa

[lukehoersten]

From melpa discussion

• The line-wrapped description line is invalid
• None of its many package dependencies are declared (cl-lib, flycheck, haskell-mode)
• There are no ;;;###autoload cookies
• There's no trailing comment line
• There's a spurious "checklist.el" in the directory which is apparently unused
• There's a "fifo.el" which should either be a separate package (if it's widely usable) or renamed to "stack-fifo.el" or similar
• There's no Commentary section, Keywords or other metadata headers

The melpa maintainer also mentioned that "renaming it [stack-mode], then "stack-ide" would be better than "stack-ide-mode", because the "-mode" prefix is deprecated for minor modes." Basically "stack-mode" implies a major mode for using stack.

[lukehoersten]

All done. Rename will not happen at this time.