Windows virtual environment: Use SSH binaries from the Git suite (#63)

* Use SSH binaries from the Git suite

* Try to kill the ssh-agent upon action termination on Windows as well

paths.js

@@ -0,0 +1,18 @@
+const os = require('os');
+
+module.exports = (process.env['OS'] != 'Windows_NT') ? {
+
+    // Use getent() system call, since this is what ssh does; makes a difference in Docker-based
+    // Action runs, where $HOME is different from the pwent
+    home: os.userInfo().homedir,
+    sshAgent: 'ssh-agent',
+    sshAdd: 'ssh-add'
+
+} : {
+
+    home: os.homedir(),
+    sshAgent: 'c://progra~1//git//usr//bin//ssh-agent.exe',
+    sshAdd: 'c://progra~1//git//usr//bin//ssh-add.exe'
+
+};
+