Use Nordpol for BaseNfcActivity

- Replace handling of intents with Nordpol tag dispatcher
- Update CreateKeyActivity to pass it's intent to the tag dispatcher
  when invoked by the system (onCreate)
- Add Fidesmo marmeladburk repository
- Add dependency on nordpol-android and nordpol-core

build.gradle

@@ -23,6 +23,9 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        maven {
+            url 'http://releases.marmeladburk.fidesmo.com'
+        }
     }
 }