Add a NotificationHandler interface

That way, the app developer can decide what to do with the notification.
 By default, ' DefaultDialogNotificationHandler` will be used, which displays an alert dialog whose Ok button opens the rich media url if present.
Rename method to MalcomLib.checkNotificaction

Also improve a couple of javadocs
Fix for update alert - wrong constant value
Fix for update alert - wrong manipulation of store url
Fix for configuration - wrong way of getting the device id

Probably we don't need the READ_PHONE_STATE permission anymore
Fix for configuration - throw clear exception if no android:versionName

That exception tells the user that android:versionName is needed in the manifest to check the app version
Merge pull request #19 from MyMalcom/notification-handler

Notification handler
Merge pull request #20 from MyMalcom/configuration-fixes

Configuration fixes
Fix: remove wrong deprecated method

I don't know why, after merging two pull requests there was a wrong deprecated method. Perhaps I forgot to remove it.
Merge commit '82b42f1de141adff719a1bc7132b4fe370db7ddd' into external-url-campaigns

Conflicts:
	README.md
	pom.xml
	src/main/java/com/malcom/library/android/module/core/MCMCoreAdapter.java