Mention the tests in the README
Fix the path to downloaded urchin script
Merge pull request #23 from reillysiemens/master

Update .gitignore to ignore urchin logs.
Fix runtests.sh to try path urchin and /tmp/urchin
Make the two install tests actually different
Move install tests into subdirectory
Make TESTDIR be an absolute path
Add another install test

Tests whether the install directory can be a multi-step directory with
multiple missing paths.
Add the Travis CI build status image
Clarify mention of PROFILE env for install
Export the modified home variable
Specify and create a profile in install tests
Move sourcing of environment into each test

Otherwise the wrong HOME value is picked up.