Making use of the values from IDataCubeSettings

* "Find countries" and "Find breakdowns" urls are now built based on the
  endpoint and queries from the portal registry
default sparql endpoint failsafe
get instead of []
fixed % data bug
addthis over https (avoid mixed content warning)
fixed bug in sorting non-numerical values
Sorting of time-period by notation (for months)
Long labels for time-period title in scatter and bubble
default value for plotlines when no data
added HR in sample configurations
N/A label and tooltip when point value missing
added series.name in tooltip for N/A values
Added NO and IS in sample configurations
redo 58836d32ee2f44807, tests were failing
fixed newline in tooltip for N/A values
readme: basic info about the project.
added NO and IS as default in scatter chart
embedding map and country profile table
tuning for map and table embedded
fixed bug with the grouping of breakdowns for breakdown-group=any