Remove reaping frequency

Upgrade step 5 suggests removing ```reaping_frequency``` to prevent crashes.
Also fixes #142.
Disable gzip compression if SSL enabled

Per the upgrade documentation, gzip compression should be disabled if SSL is in
use to prevent BREACH attacks.
Enable gzip compression for static assets

Upgrade documetnation recommends this based on Rails notes for the asset
pipeline.
Update gitlab.yml template
Version update
Merge pull request #149 from atomaka/atomaka/feature/6.8

GitLab 6.8
Allow adjustment of number of bundler threads
Use processorcount fact as default