Merge pull request #2 from 52North/master

merge development done on master branch by accident
fix missing exception handling
Throw 404 when image has not finished rendering yet
update documentation
support reference values via parameter
(and add license header .. license is subject to change)
Merge pull request #3 from ridoo/master

merge features
Update API doc, consolidate code and add JavaDoc where necessary
Merge pull request #4 from ridoo/master

Update API doc, consolidate code and add JavaDoc where necessary
configure to collect 3rd party licenses
Merge pull request #5 from ridoo/master

configure to collect 3rd party licenses
separate IoParameters (for general input/output configuration) and
QueryParameters (which inherits IoParameters to add Web exception
handling)
Merge pull request #6 from ridoo/master

separate IoParameters (for general input/output configuration) and
add license plugin to grad 3rd party licenses used in the project
add license plugin to grad 3rd party licenses used in the project
Merge branch 'master' of git@github.com:ridoo/timeseries-api.git
fix bean class
use super class methods instead of a delegate
revert license to GPL until licensing is clear
move language code to common parameter set
switch back to GPLv2 until licensing is clean