Add tid #68


Added tid field preference under Preference/Reporting/TrackerID
Included tid in Location and waypoint messages

modified:   src/main/java/st/alr/mqttitude/messages/ConfigurationMessage.java
modified:   src/main/java/st/alr/mqttitude/messages/LocationMessage.java
modified:   src/main/java/st/alr/mqttitude/messages/WaypointMessage.java
modified:   src/main/java/st/alr/mqttitude/preferences/ActivityPreferences.java
modified:   src/main/java/st/alr/mqttitude/services/ServiceLocator.java
modified:   src/main/java/st/alr/mqttitude/support/Preferences.java
modified:   src/main/res/values/strings.xml
modified:   src/main/res/xml/preferences.xml