* added updated example codes
* updated example code StringToCharStream
* deleted StringToCharStream.java locally
* removed redundant file
* added code for apache commons collection SetUtils
* refactored example code
* added example code for bytebuddy
* added example code for PCollections
* update pom
* refactored tests for PCollections
* spring security xml config
* spring security xml config
* remove redundant comment
* example code for apache-shiro
* updated example code for Vavr Collections
* updated Vavr's Collection example
* updated Vavr Collection file
* updated example code for Apache Shiro
* updated Vavr Collections example
* added example code for N1QL
* update example code for N1QL
* added integration test for N1QL
* upgrade to spring boot 1.5.2
* add full update to REST API
* modify ratings controller
* upgrade herold
* fix integration test
* fix integration test
* minor fix
* fix integration test
* fix integration test
* minor cleanup
* minor cleanup
* remove log4j properties
* use standard logbook.xml
* remove log4j dependencies
* remove commons-logging
* merge
* fix conflict
* exclude commons-logging dependency
* cleanup
* minor fix
* minor fix
* upgrade to spring boot 1.5.2
* add full update to REST API
* modify ratings controller
* upgrade herold
* fix integration test
* fix integration test
* minor fix
* fix integration test
* fix integration test
* minor cleanup
* minor cleanup
* remove log4j properties
* use standard logbook.xml
* remove log4j dependencies
* upgrade to spring boot 1.5.2
* add full update to REST API
* modify ratings controller
* upgrade herold
* fix integration test
* fix integration test
* minor fix
* fix integration test
* fix integration test
* minor cleanup
* minor cleanup
* remove log4j properties
* use standard logbook.xml