Start refactoring to v3.
A large piece of improvements and refactoring :gem:
Update information about author and Deployer itself.
Fix typo.
[skip ci]
Update README.md
Update README.md

[skip ci]
Update README.md

[skip ci]
Part of DPE.
[skip ci]
Merge remote-tracking branch 'origin/master'
=Series executor.
Update composer to use original php-ssh implementation