Enable output formatter even if no Reader, delete output file if exception during the template execution, add nquads formatter as nq.

…eURI

Also implemented for debugQuery function.

…not found (closes #23)

…tomatic binding as specified by RML

…action

…emove unused portions of the template.

…ash value, add method to TemplateFunctions to remove duplicate rows in a dataframe, optimise join_dataframe generation

…f maps, removeDuplicateRows invocation

… refactor SQLReader

…esolved

…plate, SQLReader double quotes for postgres

…om PR about joins