Merge branch 'master' of ssh://git@www.orekit.org/rugged-main.git

pom.xml

src/main/java/org/orekit/rugged/api/Rugged.java

src/main/java/org/orekit/rugged/linesensor/LineSensor.java

...resources/assets/org/orekit/rugged/RuggedMessages_no.utf8

src/site/markdown/index.md

src/site/markdown/tutorials/direct-location.md

src/site/xdoc/changes.xml

...est/java/org/orekit/rugged/errors/RuggedMessagesTest.java