Merge into master

.idea/hydra.xml

pom.xml

...in/java/de/tobias/playpad/server/json/JsonCollection.java

src/main/java/de/tobias/playpad/server/json/JsonName.java

src/main/java/de/tobias/playpad/server/json/JsonObj.java

src/main/java/de/tobias/playpad/server/json/JsonParent.java

src/main/java/de/tobias/playpad/server/sql/ColumnName.java

src/main/java/de/tobias/playpad/server/sql/ForeignKey.java

src/main/java/de/tobias/playpad/server/sql/Id.java

src/main/java/de/tobias/playpad/server/sql/Table.java

src/main/scala/de/tobias/playpad/server/PlayPadServer.scala

...main/scala/de/tobias/playpad/server/account/Account.scala

...main/scala/de/tobias/playpad/server/account/Session.scala

...tobias/playpad/server/json/BooleanSerializerHandler.scala

.../tobias/playpad/server/json/DoubleSerializerHandler.scala

...obias/playpad/server/json/DurationSerializerHandler.scala

.../de/tobias/playpad/server/json/IntSerializerHandler.scala

.../scala/de/tobias/playpad/server/json/JsonSerializer.scala

...ala/de/tobias/playpad/server/json/SerializerHandler.scala

.../tobias/playpad/server/json/StringSerializerHandler.scala