Test and fix small TODOs

To be checked:

• TimeSeriesSurface viewers
• all available Previews for the recently changed viewers (eeg, timeseriesSVG, brain)

TODOs to be fixed:

• about drawAnimated function in JS (controls.html and preview.html)
• add new attribute TimeSeriesFramework.selection_reference() ==> Connectivity or Sensors GID
• rename CONNECTIVITY_SELECTIONS into MEASURE_POINTS_SELECTIONS and have a field "fk_datatype_gid" pointing towards the Connectivity/Sensors datatype GID
• rename also the genshi attribute from connectivityGid into measurePointsGID (or something similar)
• check Brain / TS viewers for TSSurface