add inofficial parameter
add 
 * indicator if service supports first/latest values
 * parameter to force bulk latest value requests from remote
Merge pull request #29 from ridoo/master

adding (inofficial) parameter to force last value requests from remote services
update API documentation
update documentation
sort parameter outputs
Merge pull request #30 from ridoo/master

update documentation and provide sorted parameter outputs
Merge pull request #31 from 52North/develop

merge rc.1 status to master branch