changed git clone instruction

The "git clone git@github.com" style clones over SSH, which requires you to have a GitHub account with an SSH public key configured, this is less friendly. Thus i changed it to git://github.com 

byaruhaf@JATIVA:~$ mkdir -p ~/.rebar/templates
byaruhaf@JATIVA:~$ git clone git@github.com:EchoTeam/rebar-templates.git ~/.rebar/templates
Cloning into '/home/byaruhaf/.rebar/templates'...
The authenticity of host 'github.com (192.30.252.131)' can't be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
Are you sure you want to continue connecting (yes/no)? y
Please type 'yes' or 'no': yes
Warning: Permanently added 'github.com,192.30.252.131' (RSA) to the list of known hosts.
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
byaruhaf@JATIVA:~$ git clone git://github.com/EchoTeam/rebar-templates.git ~/.rebar/templates
Cloning into '/home/byaruhaf/.rebar/templates'...
remote: Reusing existing pack: 622, done.
remote: Total 622 (delta 0), reused 0 (delta 0)
Receiving objects: 100% (622/622), 563.93 KiB | 58.00 KiB/s, done.
Resolving deltas: 100% (386/386), done.
Checking connectivity... done
byaruhaf@JATIVA:~$