Update links to new repositories

After a long discussion, it turned out that CodiMD as community project
and HackMD as a company, have fundamental different views on the project
governance.

Due to this, it came to point where the decision for a fork was made.
After the fork and move towards an own organisation, this patch updates
all links inside the project to the new repositories.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

bin/setup

@@ -36,7 +36,7 @@ cat << EOF
 
 
 Edit the following config file to setup CodiMD server and client.
-Read more info at https://github.com/hackmdio/codimd#configuration-files
+Read more info at https://github.com/codimd/server#configuration-files
 
 * config.json           -- CodiMD config
 * .sequelizerc          -- db config