Fix helper position

bower.json

@@ -1,5 +1,5 @@
 {
   "name": "xterm.js",
-  "version": "0.9.1",
+  "version": "0.9.2",
   "ignore": ["demo", "docs", "test", ".gitignore"]
 }

src/xterm.css

@@ -40,12 +40,17 @@
     color: #fff;
     outline: none;
     font-family: courier-new, courier, monospace;
+    position: relative;
 }
 
 .xterm .terminal-cursor {
     background-color: #fff;
 }
 
+.xterm .xterm-helpers {
+  position: absolute;
+}
+
 .xterm .xterm-helper-textarea {
     opacity: 0;
     width: 0;