Redesigned moudule system

* 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

src/core/buildExpectationResult.js

@@ -1,9 +1,9 @@
 //TODO: expectation result may make more sense as a presentation of an expectation.
-getJasmineRequireObj().buildExpectationResult = function(j$) {
+getJasmineRequireObj().buildExpectationResult = function(j$, private$) {
   'use strict';
 
   function buildExpectationResult(options) {
-    const exceptionFormatter = new j$.private.ExceptionFormatter();
+    const exceptionFormatter = new private$.ExceptionFormatter();
 
     /**
      * Describes the result of evaluating an expectation
@@ -33,7 +33,7 @@ getJasmineRequireObj().buildExpectationResult = function(j$) {
     }
 
     if (!result.passed) {
-      if (options.error && !j$.private.isString(options.error)) {
+      if (options.error && !private$.isString(options.error)) {
         if ('code' in options.error) {
           result.code = options.error.code;
         }