5.3 update guide

Added update guide from 5.2 to 5.3

See merge request !97

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

Update Changelog for 5.3 release

Updated changelog

See merge request !96

Make the schedule_builds cron job quieter

A cron job should be quiet if all goes well. Getting an email that says
'Done' every hour is annoying for administrators.

See merge request !95

A cron job should be quiet if all goes well. Getting an email that says
'Done' every hour is annoying for administrators.

Refer people to omnibus installation

Ooops for missing this so long. /cc @jacobvosmaer @job

See merge request !94

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

Skip csrf check

See merge request !90

Parallel builds fixes

See merge request !89

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

Fix image

Fix Integration page header of required GitLab version

GitLab CI 5.2 requires GitLab 7.5

Add smtp settings to gitignore and fix comment

Required gl version

Set the required GL version in the update doc correctly

/cc @jacobvosmaer

See merge request !88

Typo fixing

Fixed a typo with a word which was missing.

Documentation for 5.2 release

Updated documentation for the 5.2 release of GitLab CI.

See merge request !87