use omnibus package to refer to omnibus gitlab at all times to avoid confusion
capitalize omnibus in docs
Merge branch 'omnibus-words' into 'master'

Omnibus words

As discussed:

We want to standarize the words 'omnibus package' to avoid (apparent) confusion regarding the installation and setup methods.

See merge request !1126
Improve commits data loading on Tree page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'faster-rev-list' into 'master'

Faster rev list

Since rugged does not support path filtering yet it affects GitLab performance.
So we use `git rev-list` as temporary but fast and reliable solution for looking last commit of tree

Fixes #1622

See merge request !1127