0.2 update, make it work (0.1 was buggy)

  * fix: p-install-deb requires sudo
  * new: p-search uses apt-cache (instead of aptitude)
  * fix: substitute the p-help PATH at installation time (Makefile)
  * new: added p- version number in p-help output
  * fix: proper permission rights on p-package-manager.sh (rw-r--r--)

  + some whitespaces

	modified:   Makefile
	modified:   debian/changelog
	modified:   p-package-manager.sh
fix: DESTDIR does not have a final '/'
update to 0.2