Add note about contacting in case of issues to top of README.
Add note about contacting in case of issues to top of README.

Sinar/mapit,chris48s/mapit,Code4SA/mapit,Code4SA/mapit,New-Bamboo/mapit,Sinar/mapit,opencorato/mapit,Code4SA/mapit,opencorato/mapit,chris48s/mapit,New-Bamboo/mapit,chris48s/mapit,opencorato/mapit