Add Makefile
Whitespace
Make test the default Makefile target

Running `make` with no args should not install.
Makefile targets which do not create files are phony

Fixes "make: `test' is up to date."
Merge branch 'pr/110'

Closes #110

* pr/110:
  Makefile targets which do not create files are phony
  Make test the default Makefile target
  Whitespace
  Add Makefile
Run the build using the Makefile