Merge pull request #1 from 52North/develop

adjust gitignore
clean up configuration
Merge pull request #2 from janschulte/develop

merging contributions
Merge branch 'develop' of https://github.com/ridoo/SensorWebClient.git into develop
formatting
fix server only configuration
ignore cache to avoid committing it into repo
Merge pull request #3 from ridoo/develop

Fixes to build server-only webapp
fix missing HTML version, as Saxon > 9 complains
using overlay configuration avoiding redundant file storage
use lookup helper
use ParameterConstellation as parameter object to simplify code
let method name speak what it does
add path variable pattern (id:.+) to match ids containing more than one
dot
simplify method
use lookup helper
ensure to return empty arrays instead of null
use ParameterConstellation as parameter obejct
remove deprecated methods
add javadoc and use filter matching only