vxJS.dom.getElementOffset() avoids NaN coordinates in IE8; expose
vxJS.hasHostMethods()

Change-Id: I23635c18c7a8210adb3c51a8862bb6922c53a37f
vxJS.widgets.simpleTabs is now pushState-aware

Change-Id: I7e6ab8e2f992b267c68563de23d788e3df66f9ee
Test: Use native addEventListener() instead of vxJS.event.addListener()

Change-Id: I89623233f8436bb985cfc8bab5244f68ef072a9b
Cleaned up global and window references

Change-Id: Ia3419057689a5508cb47c2221cdfdb86f43dd75b
Reverted previous temporary change

Change-Id: Idfa48cd8970bfe1fcc7d4210d56937260f8b6ec2