Remove prints and shorten some code in computation_parser module
Delete some useless lines
Restore code for updating the grouped indicators' weight
Delete some comments
Close #50
Merge branch 'enhancement-#50' into develop
Change validation and grouped values computation process to work with one year shift for ALL observations
Close #54
Merge branch 'enhancement-#54' into develop
Complete shifting one year forward. Untested
Close #54, close #55, close #56, close #57, close #58, close #59 and close #60
Fix merge conflicts
Merge branch 'develop'