README.md: more steps what to do after cloning

    5. the *scm* information

2. Remove the ```Process_Pixels.java``` file and add your own files

3. Edit ```src/main/resources/plugins.config```

4. Replace the contents of ```README.md``` with information about your project.

If you cloned the ```minimal-ij1-plugin``` repository, you probably want to

publish the result in your own repository:

1. Call ```git status``` to verify .gitignore lists all the files (or file

   patterns) that should be ignored

2. Call ```git add .``` and ```git add -u``` to stage the current files for

   commit

3. Call ```git commit``` or ```git gui``` to commit the changes

4. [Create a new GitHub repository](https://github.com/new)

5. ```git remote set-url origin git@github.com:<username>/<projectname>```

6. ```git push origin HEAD```