Added a gitattributes file for github linguist
Added a gitattributes file for github linguist

Ignore the base layers sql, as they are enormous
and distort the language statistics.
Also mark the hogan files as html, as it's the
most similar file type.

Emapic/emapic,Emapic/emapic,Emapic/emapic,Emapic/emapic