Merge tag '1.6.3' into develop

Version 1.6.3
Update dependencies.
Fix unit tests to reflect current dc-general.
Add test case.
This test case exploits a bug due to which recursive subselect palettes
were not added to the legend when the legend is anonymous.
Fix bug for anonymous legends in recursive subselect palettes.
Add unit test to implement feature #25 - defining position in subselect palettes.
Implement feature #25 - defining position in subselect palettes.
Merge pull request #24 from discordier/fix-recursive-subpalettes

Fix recursive subpalettes
Merge pull request #26 from discordier/feature/position-subselect

Feature/position subselect
Merge branch 'release/1.7'