Revised so that slashes are consistent in unit tests for cross OS compatibility
Revised copy_file to make directory handling OS independent
Modified tests to make more OS independent
Fixed error in setting directory for load_and_run
Always compute both the absolute and relative urls
Renamed build_title to build_title_from_filename
Added build_title_from_header and build_summary
Add call to build_title_from_header
Moved test for file extension into internal_fields
Revised tests to match new variables built
Changed documentation to relect how title is now built
Fixed regexp to get file extension and
made setting body variable conditional on successfully reading file