Move skins dir to src

src/skins/base/css/hide.css

@@ -0,0 +1,11 @@
+.mx_RoomDropTarget,
+.mx_RoomList_favourites_label,
+.mx_RoomList_archive_label,
+.mx_LeftPanel_hideButton,
+.mx_RoomHeader_search,
+.mx_RoomSettings_encrypt,
+.mx_CreateRoom_encrypt,
+.mx_RightPanel_filebutton
+{
+    display: none !important;
+}