implement message based handler
switch to mmi
Merge branch 'fedor-messagedata' of https://github.com/SiggyF/threedi-wms into fedor-messagedata

* 'fedor-messagedata' of https://github.com/SiggyF/threedi-wms:
  Add find link to netCDF4 to buildout.cfg.
implement interpolation
changes
rename to action
solved conflicts