Make sure the ID is displayed usgin run -d
Adding check for content-type header
Fix TestGetInfo when there is more than one image in the test repository

See also #1089, #1072.
Merge pull request #1078 from kstaken/fix_json_error

* Remote API: Small fix in /start if empty host config
Merge pull request #1092 from lopter/master

Fix TestGetInfo when there is more than one image in the test repository
Merge pull request #1046 from dotcloud/1043-output_id_non_attach-fix

- Runtime: Make sure the ID is displayed usgin run -d