Now I'm at the point that learning more from lazyfoo's tutorial for enough time before going back to continue for sdl2-manpage is a better idea to grasp what necessary APIs to be used.

As well, finally complete sample 17 which is long overdue.

Add sample 17 with improved Makefile and added template.c source

17_mouseEvents/.gitignore
17_mouseEvents/LButton.c
17_mouseEvents/LButton.h
17_mouseEvents/LTexture.c
17_mouseEvents/LTexture.h
17_mouseEvents/Makefile
17_mouseEvents/README.md
17_mouseEvents/button.png
17_mouseEvents/common.c
17_mouseEvents/common.h
17_mouseEvents/mouseevents.c
17_mouseEvents/mouseevents.out
template.c