Added global settings and untrackedDeveloperSettings.js-file.

untrackedDeveloperSettings.js
Create file and add line `var developerSettings = true;` on top of it.
After that some settings can be overwritten with deleloper's flavour.

-- Example File w/o line numbers --
var developerSettings = true;

var CONST_CENTERLAT = 60.0; // 45.0
var CONST_CENTERLON = 20.0; // 9.0
var CONST_ZOOMLVL   = 6; //5
-- End of Example File --

	modified:   .gitignore
	modified:   public_html/gmap.html
	modified:   public_html/script.js