add missing tests for osm objects
node tests
separate coverage build from normal build
ignore coverage files
add unit tests for TagList objects
increase test coverage for way and associated objects
tests for relation objeccts
tests for relation objects
tests for position comparison
add tests for debug handler
tests for ForwardHandler and SequenceHandler
Merge pull request #77 from jokoala/add_tests

Add tests for Way/Relation objects and some handlers.