Set getHash and formatters if undefined

[Setogit]

connect to #85

[bajtos]

@Setogit now that you are initializing getHash and formatters lazily, it is no longer necessary to initialize them at load time and these two lines can be removed:

strong-globalize/lib/globalize.js

Lines 369 to 370 in 42400af

	formatters: new MapCache(),
	getHash: memoize(md5),

    global.STRONGLOOP_GLB = {
      // ...
      formatters: new MapCache(),
      getHash: memoize(md5),
      // ...
  };

Thoughts?

[Setogit]

@bajtos: right. it's not required. I kept it because I wanted to show the intended global.STRONGLOOP_GLB structure rather than hiding it in the lazy coding. But, not religious either; i don't mind replacing the two lines with comments. In general, I prefer documenting as code (including test code) to textual comments.