*SVN* v172 - Added engine generator for creation of new engines - Fixed 'Engine' typo in README - Fixed bug in fixtures extensions - Fixed /lib path management bug - Added method to determine public directory location from Engine object - Fixed bug in the error message in get_engine_dir() - Added proper component loading - Added preliminary tests for the config() methods module pre-v170 - Fixed copyright notices to point to DHH, rather than me. - Moved extension require statements into lib/engines.rb, so the will be loaded if another module/file calls require 'engines - Added a CHANGELOG file (this file)