Some fixes

This pull request brings the following fixes/features:

 - code highlight in `README` file
 - fixed the **path to the module index file** from test files
 - created `tests` directory that contains numbered directories `1`, `2` etc
 - added `*~` and `*.swp` (temp files) in the `.gitignore` file
 - removed `defDelimiter` variable that was not defined :exclamation: 
 - fixed #6 :star2: