abstract generic logic from blueprinters to blueprinters.js

The logic in the files in the 'blueprinters' folder is now _only_ the data transformation logic. Instead of taking in arguments like the sheetId, the tabName, and the sheetName, the function now takes a single argument: the list of lists that represents the raw data from the sheet.

This setup gives datasheet-server greater value, as it allows developers to only specify the transformation logic, and not worry about the other stuff that datasheet server is doing.

src/lib/Fetcher.js

@@ -91,9 +91,9 @@ class Fetcher {
    */
   _saveViaBlueprinter (tab, data, blueprinter) {
     const saturatedBp = blueprinter(
-      tab,
-      this.sheetName,
       this.sheetId,
+      this.sheetName,
+      tab,
       data
     )