Update README.md
Update README.md
Adding GetGushHelka function

This allows the user to get the gush and helka by cityid, streetid and
houseid (as defined in the government's websites). Needs a little
cleanup as this code also contains a usage sample
cleaned up getGushHelka
remove .gitignore
Merge pull request #4 from agamrafaeli/agam

clean getGushHelka