Rename legacy to advanced
Rename legacy to advanced

Legacy API remains in use for complex queries that can not be handled by simple REST statements. (e.g. selects with function, joins, etc)

openego/oeplatform,openego/oeplatform,tom-heimbrodt/oeplatform,tom-heimbrodt/oeplatform,openego/oeplatform,openego/oeplatform,tom-heimbrodt/oeplatform