Add article about GitLab flow.
Add GitLab Flow to the index.
Fix grammar mistakes, thanks Angus
Fix spelling mistakes, thanks Nico Hamm.
Fix spelling mistakes, thanks Achilleas Pipinellis and Stephan van Leeuwen.
Fixed items mentioned by Achilleas Pipinellis, thanks.
Rewrite this section after suggestion from Achilleas.
Adding image descriptions and links as well as consolidating the link and close issues text.
Four stages.
It's the shell.
Fix problems identified by Achilleas Pipinellis, thanks Achilleas.
Insert at a random point in the changelog to prevent conflicts.
Improve the rebase reasoning.
Add sentence about tools not being able to compensate for changing commit id's.
Add wisdom about reverting a revert merge.
Remove ununsed CONTRIBUTING link on edit MR form.

The code is never reached because the new and edit MR forms have diverged,
and the CONTRIBUTING link is not shown when editing MRs.
Add unixsocketperm note to upgrade guide
Fix 'Invalid socket file permissions' error
Use gitlab_git v7.0.0.rc1

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Improve flash messages

* dont fadeout so user can read
* show inside content block so user can notice it

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>