In Safari Mac 6.0.4 (and possibly other versions), a new error does not have the stack property. Throwing the error and then catching it ensures that the stack property has the correct value. This fix gets the specs to run green in Safari.
Also, dev_boot.js is now a copy of boot.js and has additional changes to load jasmine the second time, into the j$ reference.
Failed expectations now have a `stack` property, remove `trace.stack`