Reworked Coverage Annotator to be SQL based. It now looks for the most recent annotation information in the range of revisions from currently browsed and back to previous change version, displaying the most recent if any is found (and warnings if not). Fixes #466 (and more).

[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