update after cakephp/cakephp#4526
Setting the Security salt in bootstrap
Error out when the environment lacks pcntl

Boris won't run on systems without pcntl - e.g. windows. This is a nicer
error than a fatal error from the internals of boris.

Refs cakephp/cakephp#4481
Merge pull request #137 from antograssiot/master

3.0 update after cakephp/cakephp#4526
Merge pull request #135 from cakephp/security-salt

Setting the Security salt in bootstrap
Merge pull request #136 from cakephp/windows-console

Error out when the environment lacks pcntl
Fix typo

Refs #136