Webapp REST

Webapp controllers now receive data and save to database. Hibernate
annotations added. 

Note that the webapp is missing the "business logic" part. That must be
added between TrekController and -Service. 

To start local development you must download a MySQL DB. Configs are in
application.properties, password is "root". 

Tables and sample data are in tabelid.sql. 

Close #1. Close #5. Close #8. Close #9.