move images to where sprockets expects them to be

Sprockets expects images in an engine to be in an [engine name]
directory, but the jquery ui images weren't.

The jquery ui stylesheet had to change, too, to reference images
starting at "/" rather than relative URL's.

lib/assets/stylesheets/surveyor/jquery-ui-1.10.0.custom.css

@@ -527,7 +527,7 @@ button.ui-button::-moz-focus-inner {
 	height: 100%;
 }
 .ui-progressbar .ui-progressbar-overlay {
-	background: url("images/animated-overlay.gif");
+	background: url("/images/animated-overlay.gif");
 	height: 100%;
 	filter: alpha(opacity=25);
 	opacity: 0.25;
@@ -798,15 +798,15 @@ body .ui-tooltip {
 }
 .ui-widget-content {
 	border: 1px solid #aaaaaa;
-	background: #ffffff url(images/ui-bg_flat_75_ffffff_40x100.png) 50% 50% repeat-x;
+	background: #ffffff url(/images/ui-bg_flat_75_ffffff_40x100.png) 50% 50% repeat-x;
 	color: #222222;
 }
 .ui-widget-content a {
 	color: #222222;
 }
 .ui-widget-header {
 	border: 1px solid #aaaaaa;
-	background: #cccccc url(images/ui-bg_highlight-soft_75_cccccc_1x100.png) 50% 50% repeat-x;
+	background: #cccccc url(/images/ui-bg_highlight-soft_75_cccccc_1x100.png) 50% 50% repeat-x;
 	color: #222222;
 	font-weight: bold;
 }
@@ -820,7 +820,7 @@ body .ui-tooltip {
 .ui-widget-content .ui-state-default,
 .ui-widget-header .ui-state-default {
 	border: 1px solid #d3d3d3;
-	background: #e6e6e6 url(images/ui-bg_glass_75_e6e6e6_1x400.png) 50% 50% repeat-x;
+	background: #e6e6e6 url(/images/ui-bg_glass_75_e6e6e6_1x400.png) 50% 50% repeat-x;
 	font-weight: normal;
 	color: #555555;
 }
@@ -837,7 +837,7 @@ body .ui-tooltip {
 .ui-widget-content .ui-state-focus,
 .ui-widget-header .ui-state-focus {
 	border: 1px solid #999999;
-	background: #dadada url(images/ui-bg_glass_75_dadada_1x400.png) 50% 50% repeat-x;
+	background: #dadada url(/images/ui-bg_glass_75_dadada_1x400.png) 50% 50% repeat-x;
 	font-weight: normal;
 	color: #212121;
 }
@@ -852,7 +852,7 @@ body .ui-tooltip {
 .ui-widget-content .ui-state-active,
 .ui-widget-header .ui-state-active {
 	border: 1px solid #aaaaaa;
-	background: #ffffff url(images/ui-bg_glass_65_ffffff_1x400.png) 50% 50% repeat-x;
+	background: #ffffff url(/images/ui-bg_glass_65_ffffff_1x400.png) 50% 50% repeat-x;
 	font-weight: normal;
 	color: #212121;
 }
@@ -869,7 +869,7 @@ body .ui-tooltip {
 .ui-widget-content .ui-state-highlight,
 .ui-widget-header .ui-state-highlight {
 	border: 1px solid #fcefa1;
-	background: #fbf9ee url(images/ui-bg_glass_55_fbf9ee_1x400.png) 50% 50% repeat-x;
+	background: #fbf9ee url(/images/ui-bg_glass_55_fbf9ee_1x400.png) 50% 50% repeat-x;
 	color: #363636;
 }
 .ui-state-highlight a,
@@ -881,7 +881,7 @@ body .ui-tooltip {
 .ui-widget-content .ui-state-error,
 .ui-widget-header .ui-state-error {
 	border: 1px solid #cd0a0a;
-	background: #fef1ec url(images/ui-bg_glass_95_fef1ec_1x400.png) 50% 50% repeat-x;
+	background: #fef1ec url(/images/ui-bg_glass_95_fef1ec_1x400.png) 50% 50% repeat-x;
 	color: #cd0a0a;
 }
 .ui-state-error a,
@@ -928,27 +928,27 @@ body .ui-tooltip {
 }
 .ui-icon,
 .ui-widget-content .ui-icon {
-	background-image: url(images/ui-icons_222222_256x240.png);
+	background-image: url(/images/ui-icons_222222_256x240.png);
 }
 .ui-widget-header .ui-icon {
-	background-image: url(images/ui-icons_222222_256x240.png);
+	background-image: url(/images/ui-icons_222222_256x240.png);
 }
 .ui-state-default .ui-icon {
-	background-image: url(images/ui-icons_888888_256x240.png);
+	background-image: url(/images/ui-icons_888888_256x240.png);
 }
 .ui-state-hover .ui-icon,
 .ui-state-focus .ui-icon {
-	background-image: url(images/ui-icons_454545_256x240.png);
+	background-image: url(/images/ui-icons_454545_256x240.png);
 }
 .ui-state-active .ui-icon {
-	background-image: url(images/ui-icons_454545_256x240.png);
+	background-image: url(/images/ui-icons_454545_256x240.png);
 }
 .ui-state-highlight .ui-icon {
-	background-image: url(images/ui-icons_2e83ff_256x240.png);
+	background-image: url(/images/ui-icons_2e83ff_256x240.png);
 }
 .ui-state-error .ui-icon,
 .ui-state-error-text .ui-icon {
-	background-image: url(images/ui-icons_cd0a0a_256x240.png);
+	background-image: url(/images/ui-icons_cd0a0a_256x240.png);
 }
 
 /* positioning */
@@ -1160,14 +1160,14 @@ body .ui-tooltip {
 
 /* Overlays */
 .ui-widget-overlay {
-	background: #aaaaaa url(images/ui-bg_flat_0_aaaaaa_40x100.png) 50% 50% repeat-x;
+	background: #aaaaaa url(/images/ui-bg_flat_0_aaaaaa_40x100.png) 50% 50% repeat-x;
 	opacity: .3;
 	filter: Alpha(Opacity=30);
 }
 .ui-widget-shadow {
 	margin: -8px 0 0 -8px;
 	padding: 8px;
-	background: #aaaaaa url(images/ui-bg_flat_0_aaaaaa_40x100.png) 50% 50% repeat-x;
+	background: #aaaaaa url(/images/ui-bg_flat_0_aaaaaa_40x100.png) 50% 50% repeat-x;
 	opacity: .3;
 	filter: Alpha(Opacity=30);
 	border-radius: 8px;