Added 'install.sh' as a one-stop script to download and install
everything.
Changed output to always appear on STDOUT, so upstream tool usage is
consistently "$ tool -arg > output.file"; increased version to 1.13
Removed testing dependencies (all required now), no high MakeMaker
version needed any more.
Set version in R to 1.13 to match the Perl package version
Added a description of install.sh to README, a lot of clean-up (removed
/path/to in examples).
Set master version to 1.13