Fix mistake about zoom in map doc
Fix mistake about zoom in map doc

egeloen/IvoryGoogleMapBundle,radutopala/IvoryGoogleMapBundle,egeloen/IvoryGoogleMapBundle,yappabe/IvoryGoogleMapBundle,egeloen/IvoryGoogleMapBundle,radutopala/IvoryGoogleMapBundle,yappabe/IvoryGoogleMapBundle,rasanga/IvoryGoogleMapBundle,rasanga/IvoryGoogleMapBundle,radutopala/IvoryGoogleMapBundle