uloapi: set up json routes

experimental/uloapi/pom.xml

...ntal/uloapi/src/main/java/info/mathhub/uloapi/Routes.java

...uloapi/src/main/java/info/mathhub/uloapi/query/Query.java

...i/src/main/java/info/mathhub/uloapi/query/Statistics.java

...loapi/src/main/java/info/mathhub/uloapi/rest/Filters.java

...c/main/java/info/mathhub/uloapi/rest/JsonTransformer.java

...l/uloapi/src/main/java/info/mathhub/uloapi/rest/Main.java

...uloapi/src/main/java/info/mathhub/uloapi/rest/Routes.java