Added json, xml, xslt api support.

pom.xml

...in/com/s3ai/corporate_app2/controllers/controllerUtils.kt

...orate_app2/controllers/rest/json/CinemasJsonController.kt

...orate_app2/controllers/rest/json/TicketsJsonController.kt

...rporate_app2/controllers/rest/json/UsersJsonController.kt

...rporate_app2/controllers/rest/xml/CinemasXmlController.kt

...rporate_app2/controllers/rest/xml/TicketsXmlController.kt

...corporate_app2/controllers/rest/xml/UsersXmlController.kt

...orate_app2/controllers/rest/xslt/CinemasXsltController.kt

...orate_app2/controllers/rest/xslt/TicketsXsltController.kt

...rporate_app2/controllers/rest/xslt/UsersXsltController.kt

src/main/kotlin/com/s3ai/corporate_app2/entities.kt

src/main/resources/xslt/cinema-process.xslt

src/main/resources/xslt/ticket-process.xslt

src/main/resources/xslt/user-process.xslt