improve regrex for match(sidekiq) robustness

e.g.: the sidekiq in my Debian box is v2.11.1
Fixed typo in Readme.md

Fixed 22th -> 22nd
Generate the Rails secret token on first run.

Store the secret token in a .gitignored file called ".secret", which is
created by the initializer if it doesn't exist.
Merge pull request #4040 from smashwilson/generate-secret

Security: keep the Rails secret token out of version control.
Merge pull request #4035 from samurailink3/master

Fixed typo in Readme.md
Minor improve for code highlight in wiki
Update sidekiq & devise
Update bootstrap-sass
Fix milestones list pagination style
Decorate links on focus
Update poltergeist and should-matchers
split repositories and projects api
fix missing user2 in api:repositories specs
Merge pull request #3964 from mhfan/improve-sidekiq-check

improve regrex for match(sidekiq) robustness
respect newlines for wall messages
Dont allow LDAP users to change password inside GitLab
Restyle login page for LDAP/regular login
Fix ldap auth for http push
Hipchat service implementation
Fix google analytics setting being ignored