Added toString to model classes
Added .gitignore rules for target/
Merge branch 'master' of https://github.com/dcorsar/sensor-service

Conflicts:
	target/classes/applicationContext.xml
	target/classes/uk/ac/dotrural/irp/ecosystem/sensor/model/Observation.class
	target/classes/uk/ac/dotrural/irp/ecosystem/sensor/queries/queries.properties
	target/classes/uk/ac/dotrural/irp/ecosystem/sensor/resource/impl/ObservationResource.class