* Top level private APIs (e.g. jasmine.private.whatever) are no longer
exposed
* jasmineRequire is no longer exposed
* core is self-booting
* Globals are automatically created in browsers. (They can subsequently
be removed by user code if desired.)
* Globals are *not* automatically created in Node. An installGlobals
function is exported instead. The jasmine package calls installGlobals
unless configured not to do so.
* In Node, the same instance is returned each time jasmine-core is
imported. A reset function is exported. It effectively resets all state
by discarding the env and creating a new one. This allows mulitple
sequential runs within the same process to be independent of each
other, but does not allow multiple concurrent runs. (That probably never
worked anyway.)
Fixes#2094
