use preemptive auth with ning

- basic auth to an API doesn't work without this.
  the default value of false means that credentials
  are only used when a challenge is received
Merge pull request #195 from gilt/mreed-ning-auth-fix

use preemptive auth with ning
Update configuration to record version 0.6.7
add swap files to gitignore
use slf4j in ning client, instead of println
Merge pull request #196 from gilt/ning-slf4j

use slf4j in ning client, instead of println
Update configuration to record version 0.6.8
Merge remote-tracking branch 'origin/master' into generator