Make normalization of files in Committer#add_to_index optional for handling binary files correctly.
Make normalization of files in Committer#add_to_index optional for handling binary files correctly.

gollum/gollum-lib,repotag/gollum-lib,rgroux/gollum-lib,gollum/gollum-lib,rgroux/gollum-lib,repotag/gollum-lib