Fixed the makefile? Hopefully?
Merge branch 'development'

Merge before major work on base minesweeper code. Also: Mouse input is
now a thing and the source is a bit less messy.
Merge branch 'development'

Conflicts:
	makefile
Add basic getopt support with option for user-specified MINE_DENSITY
conform to style; simplify getopt loop; add usage function
Merge pull request #1 from HalosGhost/master

Add basic getopt support with option for user-specified mine density
Merge branch 'master' into development

Merging the pull request.
Fixed PR sillies. Began work moving g code to different source files.