Returned CSS directory reference to hypothesis imports.

xml/css/hypothesis.css

		-@import url( "edit-discuss-flag.css" );
		-@import url( "xref.css" );
		+@import url( "css/edit-discuss-flag.css" );
		+@import url( "css/xref.css" );

		.policy {

Delta	2 lines added, 2 lines removed