Add NOTES file (with hints regarding jenkins.rb).

NOTES

@@ -0,0 +1,28 @@
+Install jenkins.rb on Debian
+----------------------------
+
+Goal: Clean installation of https://github.com/cowboyd/jenkins.rb on Debian.
+
+Recipe provided by Michael Prokop:
+
+  mkdir jenkins-rb.deb ; cd jenkins-rb.deb
+  gem2deb httparty
+  gem2deb crack
+  gem2deb thor
+  sudo apt-get install libterm-ansicolor-ruby ruby-json libbuilder-ruby
+  sudo dpkg -i ruby-crack_*.deb  ruby-httparty_*.deb  ruby-jenkins_*.deb  ruby-thor_*.deb
+
+Recipe provided by Michael Gebetsroither:
+
+  git clone git://github.com/gebi/rubyrrdtool.git
+  cd rubyrrdtool
+  ruby extconf.rb
+  make
+  checkinstall -D --pkgname=rubyrrdtool --maintainer=whatever@example.org --install=no --pkgversion=0.6.0 make install
+
+Install python-jenkins on Debian
+--------------------------------
+
+Goal: Clean installation of https://launchpad.net/python-jenkins on Debian.
+
+TODO