Window level higher than normal

When displaying the Toast under status bar the windowLevel is set to `UIWindowLevelNormal`. However, this is not fully correct because this window is on top of the main application window. When using this library with others like `SVProgressHUD`, they have problems identifying the proper place to insert themselves. Just adding a small amount (+1) works and configures this window on proper level (above the app).
Fix bug where +dismissAllNotifications: does not respect the animated flag
Merge pull request #79 from junjie/fix-dismiss-all-animation

Fix bug where +dismissAllNotifications: does not respect the animated flag
Merge pull request #70 from angelolloqui/master

Window level higher than normal
Create CONTRIBUTING.md
Update CONTRIBUTING.md
Update CONTRIBUTING.md
Fixes first display in landscape on iPad

Before rotating, if the app is launch in landscape and the notification
is displayed, avoids some strange issue related to rotation.
Merge pull request #1 from natanrolnik/master

Fixes landscape problem