Added an install target in Makefile, supports DESTDIR.
Merge pull request #3 from uppfinnarn/master

Fixed up Doxygen stuff
--Small fixes related to release scripts.
--Updated main page.txt
--Updated Changelog to release 1.1.2
--Added link to current release.
--Added zip feature to release.sh :P
Merge pull request #4 from xantares/install-target

Added an install target in Makefile, supports DESTDIR.