compress images

src/client/styles/agile-admin/inverse/colors/halloween.scss

@@ -60,11 +60,11 @@ $inline-code-bg: #0a121b;
 }
 
 #wrapper > .navbar > .navbar-header {
-  background-image: url("/images/themes/halloween/halloween-navbar.png");
+  background-image: url("/images/themes/halloween/halloween-navbar.jpg");
 }
 
 .main-container > #wrapper > #page-wrapper {
-  background-image: url("/images/themes/halloween/halloween.png");
+  background-image: url("/images/themes/halloween/halloween.jpg");
   background-attachment: fixed;
 }
 

src/client/styles/agile-admin/inverse/colors/wood.scss

@@ -40,7 +40,7 @@ $inline-code-bg: lighten($subthemecolor, 70%);
 }
 
 .main-container > #wrapper > #page-wrapper {
-  background-image: url("/images/themes/wood/wood.png");
+  background-image: url("/images/themes/wood/wood.jpg");
   background-attachment: fixed;
 }
 
@@ -57,7 +57,7 @@ $inline-code-bg: lighten($subthemecolor, 70%);
 }
 
 #wrapper > .navbar > .navbar-header {
-  background-image: url("/images/themes/wood/wood-navbar.png");
+  background-image: url("/images/themes/wood/wood-navbar.jpg");
 }
 
 // login page