Initial commit, add .gitignore

Add the .gitignore file which contains pattern of filenames not to be
tracked.
Add exercises of 16. kolo

Add '16. kolo.pdf' pdf file documenting the five exercises of 16.
kolo(round).
Add the solved exercises of 16. kolo

Add the solutions to exercises of 16. kolo/round, which are five
python scripts.
Merge branch 'master' of https://github.com/neven-sajko/srednjoshkolska_infica-python

Just a README at github remote