Modify empty project instructions to use double quotes for commit msg.

http://feedback.gitlab.com/forums/176466-general/suggestions/6006904-modify-instruction-to-use-double-quotes-for-windo
Merge branch 'double_quotes_empty_project' into 'master'

Modify empty project instructions to use double quotes for commit mesage

Fixes http://feedback.gitlab.com/forums/176466-general/suggestions/6006904-modify-instruction-to-use-double-quotes-for-windo

See merge request !179
Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ce