Update ol3

update ol3

https://github.com/geoadmin/ol3/commit/7d324ebdbe854b3f6348c7721a27721ad977f8f6
https://github.com/geoadmin/ol3/commit/f5c0b0e20b8e5c9ac502893018a3de66921861fd
https://github.com/geoadmin/ol3/commit/c52a82d791d5bca484971f22d14c386015b8068c