Compatibility with Google Map Static API V2 and PHP 5.4

- Update prefix URL of Google API
- Update static function declarations
- Fix errors after call ZoomToFix without markers
- Update toImgTag function with new parameters:
+ id (string): Add attribut "id" from <img> tag
+ class (string): Add class name from <img> tag
+ addLink (boolean): Add a <a> tag between <img> tag with href from
google map
Remove old comment
Merge pull request #1 from jajadesforets/master

Compatibility with Google Map Static API V2 and PHP 5.4