Re-activated continuous x-scaling. Reverted [fda1872]
Bugfix. Previous commit contained incorrect column manipulation.
Changed trimming of concept path strings only in case there is something to trim (otherwise it would generate NAs)
Revert "Changed trimming of concept path strings only in case there is something to trim (otherwise it would generate NAs)"

This reverts commit ad15eb7201d4feee33e294e5487f69612b984acc.
SAN-208 Better handle scaling on x axis
-initial version without frontend integration (not reading request params) and R integration (not passing script params)
Implemented R-script functionality for receiving a file that maps each group-value (concept path) to an X-axis position value.

If the scaling.filename argument remains at default value NULL, it will plot each group on integer locations on the X-axis.
Better inform the user of empty result sets
Adds checkbox whether or not to plot evenly spaced
SAN-208 Better handle scaling on x axis
-initial version without frontend integration (not reading request params) and R integration (not passing script params)
Removes plotEvenlySpaced argument

It was agreed that the R script would look at a special file which
contains the spacing data.
Merge branch 'features/208X-axisScaling' into features/SAN-208_BetterScaling
SAN-208 Better handle scaling on x axis
-frontend setting is now connected to backend and R script
-R script has some problem, so this version is not ready yet to be merged
Merge branch 'features/SAN-208_BetterScaling' of github.com:thehyve/Rmodules into features/SAN-208_BetterScaling

Conflicts:
	src/groovy/jobs/LineGraph.groovy
	src/groovy/jobs/table/ConceptTimeValuesTable.groovy
Added correct column information for data aggregation. Threw out time_value column before.
Manual merge of of implemented features from other branch in LineGraph r-script.

This should prevent merge conflicts in the R file for branch owner later on.
Cherry picked most recent LineGraphLoader.r commit from branch 225, and resolved inbound merge conflicts for this specific file.
Fixed data seperation bug.

A PLOT_GROUP column with only NA values was interpreted as group values,
but without proper data handling downstream. This is now handled
correctly.
Merge branch 'features/225-ui-high-dimensional-line-graph' into features/SAN-193_LineGraph_refactor

Conflicts:
	src/groovy/jobs/LineGraph.groovy
	src/groovy/jobs/steps/helpers/SingleOrMultiNumericVariableColumnConfigurator.groovy
	web-app/Rscripts/LineGraph/LineGraphLoader.r
Merge branch 'features/SAN-193_LineGraph_refactor' of github.com:thehyve/Rmodules into features/SAN-193_LineGraph_refactor
Merge branch 'master' into features/SAN-193_LineGraph_refactor