update pom parent, add .DS_Store in gitignore, update some classes

.gitignore

pom.xml

src/main/java/plugins/fab/trackmanager/Link.java

...plugins/fab/trackmanager/PluginTrackManagerProcessor.java

src/main/java/plugins/fab/trackmanager/TrackDetection.java

src/main/java/plugins/fab/trackmanager/TrackGroup.java

...main/java/plugins/fab/trackmanager/TrackLengthDialog.java

src/main/java/plugins/fab/trackmanager/TrackManager.java

...in/java/plugins/fab/trackmanager/TrackManagerPainter.java

...ugins/fab/trackmanager/TrackManagerProcessorListener.java

...ava/plugins/fab/trackmanager/TrackPainterChangeEvent.java

...n/java/plugins/fab/trackmanager/TrackPainterListener.java

src/main/java/plugins/fab/trackmanager/TrackPanel.java

src/main/java/plugins/fab/trackmanager/TrackPool.java

src/main/java/plugins/fab/trackmanager/TrackSegment.java

...va/plugins/fab/trackmanager/blocks/LoadTracksFromXML.java

...java/plugins/fab/trackmanager/blocks/SaveTracksToXML.java