fixed minor bug with keyboard handler...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

jli.js

@@ -257,6 +257,7 @@ function makeKeyboardHandler(keybindings, unhandled){
 				var key = evt.keyCode
 				if(bindings.ignore != null && bindings.ignore.indexOf(key) != -1){
 					// return true
+					res = res == null ? true : res
 					did_handling = true
 					continue
 				}

keybindings.js

@@ -12,6 +12,7 @@ var keybindings = {
 			116,												//	F5
 			122,												//	F11
 			123,												//	F12
+			8													//	BkSp
 		],
 
 		// togglable modes and options...

magazine.js

@@ -29,6 +29,7 @@ var DRAG_FULL_PAGE = true
 var USE_REAL_PAGE_SIZES = false
 
 
+
 /*********************************************************************/
 // toggles .dragging CSS class on the viewer while dragging is in 
 // progress.