removed repository declaration in sub-pom
fixed Java 8 generics issue
LinkedSets to maintain order
enable Java 8 on Travis
Merge remote-tracking branch 'upstream/develop' into develop

* upstream/develop:
  Fix duplicate column definition.
change default value for service.sosUrl to end in /service
added NetBeans configurations to .gitignore
adjusted client to use /service endpoint
Remove override annotation
fixed client binding selection
speed up build by fetching SCM revision only once
fixed OGC logo URL in footer
call GeoDB.InitGeoDB() for H2 in memory and file based databases
Merge branch 'develop' into fix/java8-compability

* develop:
  fixed OGC logo URL in footer
  speed up build by fetching SCM revision only once
  Fix duplicate column definition.
  removed repository declaration in sub-pom
Merge branch 'develop' into feature/content-negotiation

* develop:
  fixed OGC logo URL in footer
  speed up build by fetching SCM revision only once
override XPathFactory implementation for SAXON

see https://saxonica.plan.io/issues/1944
Merge pull request #27 from autermann/fix/missing-geodb-init

Fixed spatial filtering for H2/GeoDB
Merge pull request #28 from autermann/feature/content-negotiation

Use /service endpoint as default setting and in client
Merge pull request #29 from autermann/fix/java8-compability

Oracle JDK 8 compatibility
Remove version: it is already managed