add test to cover relative path linked resources after redirect

Conflicts:
	test/history_test.coffee
add test for forms after redirect
bugfix: relative path linked resources should resolve relative to final url if request was redirected

Conflicts:
	lib/zombie/window.coffee
Update README.md

Fixed dead link
Merge pull request #824 from louwers/patch-1

Update README.md
FIXED pressButton timeout with EventSource
ADDED support for completion in browser.waitForServer
FIXED wait should be able to resolve/reject
Even simpler handling of two-arguments wait
Updated changelog
Merge branch 'master' into pr/454

Conflicts:
	src/zombie/window.coffee
	test/history_test.coffee
CHANGED load is now asynchronous just like wait
Use updateLocation not replaceEntry
Revet to not loading documents with unsupported protocols
Version 2.5.1
Version 2.5.1
Fixed accept header - not forced to text/html anymore
Merge pull request #827 from naugtur/master

Fixed #826 accept header - not forced to text/html anymore
FIXED test waitForServer with completion function