hopefully last Makefile mash-up
Tweaked Makefile a bit:
 You can set where it should install Sparkling using DESTDIR
 spn.o & spn executable are no longer built in the current dir
 It now fully respects the $(OBJDIR) setting
Merge pull request #2 from sfan5/patch1

Tweaked Makefile a bit
Merge branch 'master' of github.com:H2CO3/Sparkling
fixed broken build system once again
exit() now works without an argument; assumes successful termination
clarified semantics of arrays as function argument