typo: s/connexions/connections
Merge pull request #1389 from dotcloud/1373-improve_checklocaldns

Consider empty /etc/resolv.conf as local dns + add unit test
add docs
Merge pull request #1182 from dotcloud/change_build_usage

change tag -> repository name (and optionally a tag) in build usage
Merge pull request #1400 from gorsuch/doc-typo

* Documentation: fix a typo in the ubuntu installation guide
fix entrypoint without cmd
added tests for 1405