Merge pull request #2812 from dotcloud/bump_v0.6.7

Bump v0.6.7
update release checklist
Add a few more small RELEASE-CHECKLIST tweaks, fixes, and improvements
Add space-escaping to path parts of lxc.mount.entry lines in generated lxc.conf, allowing for spaces in mount point names

Fixes #2802
Format lxc_template.go with gofmt
Merge pull request #2857 from shykes/0.7-release

0.7 release
Merge branch 'release'
Add explicit test strings for new escapeFstabSpaces function
fix docker run on an unknown image
Merge pull request #2869 from dotcloud/fix-docker-pull-run

fix docker run on an unknown image
fix -link parsing
Merge pull request #2870 from dotcloud/fix-links-parsing

fix -link parsing
Fix the 'but is not' typo.
Fix command line help for docker save

`docker save IMAGE DESTINATION` is not what `docker save` expects
fix typo in CONTRIBUTING.md
Merge pull request #2872 from goldmann/runtime_typo

Fix the 'but is not' typo
Merge pull request #2884 from nikai3d/patch-1

fix typo in CONTRIBUTING.md
Add mkseccomp.pl, helper script to make seccomp profiles.
Fix CHANGELOG: we ended up not merging the btrfs driver for last night's release
Add ParseRun unit tests