#19, #20 added DbSystem parameter to schema mapping
#19 #20 added system field in schema documentation
#19, #20 added sql testing algorithm
Merge branch 'master' into DbSystem-configuration
Merge branch 'master' into DbSystem-configuration

Conflicts:
	backend/src/main/java/de/uni_potsdam/hpi/metanome/results_db/DatabaseConnection.java
Added DB System field to frontend.
Merge branch 'DbSystem-configuration' into refactor_data_source_page

Conflicts:
	frontend/src/main/java/de/uni_potsdam/hpi/metanome/frontend/client/datasources/DataSourcePage.java