update release checklist
Add a few more small RELEASE-CHECKLIST tweaks, fixes, and improvements
Add ParseRun unit tests
Make volumes opts more strict
Add parseRun volume unit tests
there appears to be a slash prepended to a container name internally - don't tell the user about it in an error message, it might cause them to worry about it
tell anyone that might want to ignore their editor choice's backup files that there is a better way - thanks @pnasrat
Allow multiple clients to pull the same tag simultaneously

If two clients simultaneously try to pull the same tag, there was a race
whereby one would succeed and the second would generate an error. Now,
the second simply waits for the first to complete.
Handle the case where poolAdd() gives an error for an unknown pool type
Performance of deleteImageAndChildren.

Don't walk the file system for parents each time we recurse.

Fixes #2852
Merge pull request #2910 from codeaholics/wait-for-simultaneous-pull

Allow multiple clients to pull the same tag simultaneously
Merge pull request #2904 from SvenDowideit/dont-show-user-internal-slash-in-error-message

there appears to be a slash prepended to a container name internally
Merge pull request #2814 from dotcloud/release_checklist_update

update release checklist
Add instructions for opening issues on the repository
Merge pull request #2831 from SvenDowideit/please-ignore-squiggle-backup-files

Please ignore squiggle backup files
Merge pull request #2914 from crosbymichael/open-issues

Add instructions for opening issues on the repository
Move syscall.Stats logic to os specific file.

related to #2909.
Merge pull request #2927 from andrewsmedina/stat_macos

Move syscall.Stats logic to os specific file.
Merge pull request #2913 from pnasrat/2852-deleteimage-performance

Performance of deleteImageAndChildren.
Merge pull request #2892 from creack/add_cli_test-1

Add ParseRun unit tests