Maven

Project converted to maven:
- removed idea files
- removed libs

To build:
- mvn package
it build 2 jars:
target/AeroQuadConfiguratorJava-0.0.1-SNAPSHOT.jar (need 3rd party jars in classpath to run)
target/AeroQuadConfiguratorJava-0.0.1-SNAPSHOT-jar-with-dependencies.jar (include 3rd party jars)

To run:
java -jar target/AeroQuadConfiguratorJava-0.0.1-SNAPSHOT-jar-with-dependencies.jar

Important changes:
- property is in jar. 

Minor changes:
- varios warnings solved:
  - @SupressWarnings ins serealized classes
  - remove unused imports
  - remove unused variables
- fix line endings (convert to auto, see https://help.github.com/articles/dealing-with-line-endings)
- remove unused log4j config