refactor(list): changing no-borders to no-lines b/c Ben hated it

Added line for headers on Android. Added some more tests for cards with
lists. Removed unused CSS. References #387

ionic/components/list/modes/ios.scss

@@ -88,8 +88,8 @@ $list-ios-header-color:               #333 !default;
   margin-top: 0;
 }
 
-&.hairlines .list[no-borders],
-.list[no-borders] {
+&.hairlines .list[no-lines],
+.list[no-lines] {
   ion-header:after,
   .item:before,
   .item:after {

ionic/components/list/modes/md.scss

@@ -67,8 +67,11 @@ $list-md-header-color:           #858585 !default;
   margin-top: 0;
 }
 
-.list[no-borders] {
-  ion-header:after,
+.list[no-lines] {
+  ion-header + .item:before {
+    border-width: 1px;
+  }
+
   .item:before,
   .item:after {
     border-width: 0;

ionic/components/list/test/no-lines/main.html

@@ -1,7 +1,7 @@
-<ion-toolbar><ion-title>List No Borders</ion-title></ion-toolbar>
+<ion-toolbar><ion-title>List No Lines</ion-title></ion-toolbar>
 
 <ion-content class="outer-content">
-  <ion-list no-borders>
+  <ion-list no-lines>
     <ion-header>
       List Header
     </ion-header>