Run tests in both jasmine1 and jasmine2

Use the MAJOR_JASMINE_VERSION environment variable
Got our first 2 passing regression tests.

Passing: 2/10
Fixes a 1.x regression I added to equality testing
Replace use of jasmine.getEnv().currentSpec 

Turns out a beforeEach could just trap the user-facing context value
and that's always been good enough for me.

cc/@dwfrank
Apparently I have to re-add matchers on each run?

6/10 passing
Fixed remaining specs by improving matcher wrapper

10/10 regression tests passing.
Add dependency on matcher-wrapper for node.
2.6.0