Merged to integration
Conflicts:
	src/modules/regress/LinearRegression_impl.hpp
	src/modules/regress/LinearRegression_proto.hpp
	src/modules/regress/linear.cpp
	src/modules/regress/logistic.cpp
	src/ports/postgres/modules/regress/linear.sql_in
	src/ports/postgres/modules/regress/logistic.sql_in
	src/ports/postgres/modules/regress/robust.sql_in
	src/ports/postgres/modules/regress/test/robust.sql_in