Merge pull request #53 from pelopina6/master

Brew pkgconfig lookup

Merge pull request #46 from cyrusingraham/Issue-44

Issue 44

Add Swft 5.2 note

Merge in cssh

Merge pull request #39 from columbbus/master

Enabling public access for new SFTP methods

Merge pull request #38 from columbbus/master

Implemented more SFTP methods

Merge pull request #29 from Einstore/master

Upload data and string as file using SFTP

Update to Swift 4.2

Make SSHAgent init public