+ load csv for chosen curves only.
Merge branch 'master' of github.com:griddynamics/jagger into csv-only-chosen

Conflicts:
	webclient/src/main/java/com/griddynamics/jagger/webclient/client/components/LegendTree.java
+ true copy constructor for MetricGroupNode
Merge branch 'master' of github.com:griddynamics/jagger into csv-only-chosen

Conflicts:
	webclient/src/main/java/com/griddynamics/jagger/webclient/server/DownloadServiceImpl.java
+ add check legendTree == null in PlotIntegratedDto
+ refactor csv-file generator little bit
- remove unused methods
Merge pull request #547 from amikryukov/csv-only-chosen

JFG-804 Load csv for chosen curves only.