Development environment:

Download and install the latest JDK 8 from http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
Make sure JAVA_HOME refers to the this JDK.
Make sure java executable has correct version. Run "java -version" to check it.

Build and run instructions:

Navigate to /config directory and review ui.yml and core.yml. Application mostly works as is but you need to set mail properties in ordrer to use notification service.
Run mvnw clean install command in root directory to build and test solution
Run java -jar air-tickets-core/target/air-tickets-core.jar
Run java -jar air-tickets-ui/target/air-tickets-ui.jar
Open http://localhost:8080 to check if client works