Fixing arrays in get params

In browsers check for XMLHttpRequest, not window

Test for ActiveXObject

Fixing isArrayLike to allow length as a param. Added test

In nodejs testing environment it's possible to use https://github.com/tmpvar/jsdom library to define a window object, but you still want to use node http adapter. Due to those diverse testing environmnents, I propose to test for XMLHttpRequest directly, because window global object is not a sure sign of a browser environment anymore.

closes #69

closes #53

closes #55

Adding typescript element to package.json for TSD linking

closes #46