Added functions and apis to get validated charts (single and correlated) and to draw single correlated charts
Merge branch 'feature/visualisations' of codebasehq.com:playgen/celar/datacon into feature/visualisations
Reworked validation to reference new tables and to include ranking observations
Merge branch 'feature/angular' into feature/visualisations

Conflicts:
	src/dataplay/tablestocharts.go