unify/unify — pull request #133 by mcdit (2012-07-19 13:23:04+00:00)
Title: Fix/requestheader

Added the possibility to remove a request header from the request header map by setting the value to null.
Example : this.setRequestHeader("If-Modified-Since", null);

This is useful if you have more than one service defined in your remoteData implementation and those need different request headers.