add --exclude-path flag for runner to exclude some folders (logs etc.)

Hi,

I started using your script to run my uni tests, however, there was a problem with my logs files. Every time I run my tests there are some logs generated and then after it the runner detects change again and run my tests another time. To avoid this I added additional flag to exclude my log folder.

I also fixed some spelling mistakes.

Hop you like it and merge it.

Regards,
Dawid