added tutorial on uploading files

docs/index.rst

@@ -24,6 +24,7 @@ Tutorials
    tutorials/writing_content
    tutorials/styling_content
    tutorials/text_replacements
+   tutorials/uploading_files
    tutorials/publishing_content
 
 

docs/tutorials/uploading_files.rst

@@ -0,0 +1,23 @@
+How to upload a file 
+--------------------------------------------------------------------------
+
+
+
+The `meta.json` file
+===========
+
+Filenames and titles of files are distinct on canvas: 
+the latter is what you will see when the file is placed in a module, while the former is what is shown in the file structure.
+
+You can place a file in as many modules as you wish by specifying the modules in the `meta.json` file. 
+The key `module` has a value which is a list of names of modules in the Canvas course. 
+If no module with the specified name exists, a module will be created to house the file.
+
+The `destination` key specifies where in the file structure you would like the file to be placed.
+
+
+Example
+===========
+
+
+