Subclassing issues

[mamouneyya]

When subclassing the web browser view controller in Swift, the library seems to not access the resources anymore, making back / forward bar button images disappear.

[mamouneyya]

After a quick digging in the code, I can see that in line 408 in KINWebBrowserViewController.m you get the class of the bundle using self, which won't work when subclassing. Explicitly specifying the class name solves the issue:
NSBundle *bundle = [NSBundle bundleForClass:[KINWebBrowserViewController class]];
instead of:
NSBundle *bundle = [NSBundle bundleForClass:[self class]];

I can make a PR for you if you're okay.

[wei]

Duplicate of #57