add Authorization to allowed headers
add class with constants for the keys of http headers
use the http header key constants in the route classes
use Authorization header instead of queryParams to authorize
add Authorization header to header keys
use the authorization header constant
fix TestRestApi according to new Authorization
update readme according to new authorization implementation
add more infos to the usage part
Merge branch 'change_auth'
POST link demands json in form {'link':{'url':....) instead of {'url':'www.asdf.org', ..
create JsonAccessor for testing to save the different json strings in extra files
use the JsonAccessor in TestRestApi
add link in json file
now possible to get example link via JsonAccessor
use JsonAccessor in TestGetLinkByIdRoute
refactor JsonAccessor
use JsonAccessor in TestPostLinkRoute
add LINK constant to LinkFields
stop using files in JsonAccessor and build them via json-simple