Removes the generic aliases which MAY clash with names of already declared by other applications
[CI] allowing latest ruby version

ruby is on 2.1.2 now, but, using just 2.1 on travis it will be automatically now and in future versions
Merge pull request #1700 from lucianosousa/patch-1

[CI] allowing latest ruby version
update minitest inheritance class. avoid future deprecation
removing duplicated code
normalize conditional on retry or delete call
locking rails version on 4.1.x and minitest on 5.3.x
Merge pull request #1702 from lucianosousa/patch-2

removing duplicated code
Merge pull request #1701 from lucianosousa/minitest-update

update minitest inheritance class. avoid future deprecation
Fix build
REALLY fix build
third time's a charm
Refactor ProcessSet to yield a Sidekiq::Process
Implement remote signals via heartbeat
Pro 1.7.1 notes
Fully functioning remote control via Web UI, yay!
Merge pull request #1703 from mperham/quiet_api

Add API to remotely control Sidekiq processes
tweak changes
Refactor CLI#parse so it does not boot Rails or require app code and is therefore safer to test.
Fix issues with non-deterministic global test state