[MOD] Created parent pom.xml and moved the common elements from basex-core and basex-api
[DEL] Cleaned up intellij project files
[DEL] removed version and groupId from child poms
[MOD] basex-tests and basex-examples have basex-parent as parent, too
Merge pull request #750 from dimitarp/mvn-restruct

Maven parent project and Intellij project file clean