synced against vanilla CI v1.7.3 distro
removed CI core files from v1.7.3.
dropped CI v2.0.0 files in
updated copyright date range in CI license
upgraded front controller script from CI v2.0.0 distro (index.php)
prefixed Controller with CI_, updated call to parent controller with PHP5 syntax
prefixed Model  with CI_, updated call to parent controller with PHP5 syntax
filled "encryption_key" setting with placeholder token
replaced calls to removed orderby() function with replacement order_by().
changed "ci_sessions" table definition in DB installation script, and added code to re-create that table in the DB upgrade script.'
added new config files
synced config files against CI 2.0.0 distro
toggled "enable_query_strings" setting off since it was breaking redirect functionality
added "encryption_key" setting so build properties. touched up comments.
added placeholder substitution directive for encryption key
moved application folder outside the systems folder.
moved systems/logs directory to the application directory.
adjusted git ignore list to accomodate for changed config file locations.
updated shibboleth configuration example due to changes in application directory layout.
updated filepaths/links from 'system/application/...' to application/...