This alters the `svn:checkout` command to take an extra parameter, `shared_path`, which will be used to share checkouts, preventing checking out the whole project for every revision that's tested. `shared_path` is relative to the project directory, so for standard usage set `shared_path` to something like `../trunk` Fixes #289

[egg_info]
tag_build = dev
tag_svn_revision = true

[unittest]
xml_output = build/test-results.xml
coverage_summary = build/test-coverage.txt
coverage_dir = build/coverage