[finishes #45659879]
Since this information is desired in ConsoleReporter, HtmlReporter, and now JsApiReporter, the executionTime is passed through in jasmineDone from Env instead of making each reporter compute it. Fixes #30, [Finishes #45659879]
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.