added gitignore
added very basic Spring MVC stuff
added bootstrap
added starts of GameNode and GameTree
added jsplumb library with example
changed id of DOM element to "game-tree"
only one endpoint per element, located in the center
code cleanup
extracted database configuration to database.properties
added log4j configuration
added postgresql connector
added database check using Session
made changes to the entities
added methods in controller for handling form input
added setter for name to fix bug with form input
corrected name for gametree id field
added NodeTag entity
added more fields to GameNode
added the possibility to add a GameNode to a tree
reduced toString method for GameNode to avoid trying to instansiate a lazy collection, and thus avoid a crash