Ajax: use anchor tag for parsing urls

Fixes gh-1875
Closes gh-1880
(cherry picked from commit 5a75278e4c5359e07303fc4d8e78a1cf94f6ad65)

Conflicts:
	src/ajax.js
Support: Correct iOS 8 support test results, re-arrange entries
README: various text fixes

Thank you @essamjoubori, @bcbcb, @namlede

Ref 31b63fc23674ede657f019783ad7b942bb83f9c3
Sizzle: update 2.1.1