Update creating-maintaining-new-project.md

quad/doc/creating-maintaining-new-project.md

@@ -30,3 +30,18 @@ and adding the following at the end of the file:
     make_wrapper -files [get_files ${origin_dir}/${_xil_proj_name_}/${_xil_proj_name_}.srcs/sources_1/bd/design_1/design_1.bd] -top
     add_files -norecurse ${origin_dir}/${_xil_proj_name_}/${_xil_proj_name_}.srcs/sources_1/bd/design_1/hdl/design_1_wrapper.vhd
 ```
+
+# Version Control
+At the top of the tcl file for the project, there is a list of files that need to be in version control.
+All of these should be added to the repo, as well as the tcl script itself, but not the `design_1_wrapper.vhd` file.
+No other files for this project need be added to the repo. Any time you add a source file, please add it under src, not the auto-generated folder.
+If you add it to the auto-generated folder, the scriopt will not be able to build the project as it will delete the file before building and then be unable to find it.
+
+## I made a mistake and added a new file to the default folder
+1. Don't do that again please
+2. We can fix it:
+
+1. Go in to the folder structure and copy the file from the bad place (see file properties in Vivado) to `<project>/src/...`
+2. Go into Vivado and delete the old file from the project
+3. In Vivado, add the new file to the project
+4. Update git to revision the new file.
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