Switch to configured git user

The git daemons were configured statically with user "git". When
node[:gitorious][:user] was configured as a *different* user, these
daemons would thus fail.
Convert SSL paths to attributes

Normally SSL sites will want to use their own, valid SSL certificate and
key, instead of using the self-signed "snake-oil" certificate. Configure
the path to the key and certificate in gitorious cookbook attributes.
Merge pull request #5 from greenmoss/fix_git_daemon_user

Switch to configured git user
Merge pull request #6 from greenmoss/apache_ssl_cert

Convert SSL paths to attributes