initial implementation
only add the rpc postfix if it is missing
the fem-scripts requires the rpc-postfix to be present in the given url
support room filter
python3 compat
introduce rendertask class and more py3 compat stuff
export large parts into renderlib to reuse them from the tracker-script
Merge branch 'master' into tracker-script
fix parameter quoting to that it works both with filter-dicts and multiline-values including spaces
implement rnedering via renderlib and nice error reports via traceback
migrate to new Rendertask-Class