changelog: updated
readme: fix TOC indentation levels
install: switch back to the bash shell for git user
init: configure sidekiq concurrency using the `-c` flag
init: set default SIDEKIQ_CONCURRENCY to 25
Merge branch 'fix-sidekiq-concurrency'

Fixes #174
readme: use simpler mysql GRANT query
init: removed unused sidekiq.yml config template
init: automatically compile assets if relative_url is changed

Closes #171
install: use GITLAB_INSTALL_DIR macro in supervisor configs
Merge remote-tracking branch 'upstream/master'