Updated license information for base license, custom-tile-overlay/tiles, and ground-overlay/img.

Author: SebQuintas-zz

LICENSE

@@ -1,3 +1,5 @@
+Unless otherwise noted in a LICENSE file for specific files or directories, the files in this repository are under the following license.
+
 The MIT License (MIT)
 
 Copyright (c) 2016 HERE Europe B.V.
@@ -19,4 +21,3 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
-

custom-tile-overlay/tiles/LICENSE

@@ -0,0 +1,9 @@
+This is a faithful photographic reproduction of a two-dimensional, public domain work of art. The work of art itself is in the public domain for the following reason: 
+
+This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or less.
+
+The official position taken by the Wikimedia Foundation is that "faithful reproductions of two-dimensional public domain works of art are public domain".
+This photographic reproduction is therefore also considered to be in the public domain in the United States. In other jurisdictions, re-use of this content may be restricted; see Reuse of PD-Art photographs for details.
+
+Reuse of PD-Art photographs: https://commons.wikimedia.org/wiki/Commons:Reuse_of_PD-Art_photographs
+See also: https://commons.wikimedia.org/wiki/Commons:Reusing_content_outside_Wikimedia