Reorganizing plugins so that each plugin has it's own directory now so that any plugin-specific functions can be bundled within there.

plugins/ssh-agent/ssh-agent.plugin.zsh

@@ -0,0 +1,23 @@
+# Based on code from Joseph M. Reagle
+# http://www.cygwin.com/ml/cygwin/2001-06/msg00537.html
+
+local SSH_ENV=$HOME/.ssh/environment
+
+function start_agent {
+  /usr/bin/env ssh-agent | sed 's/^echo/#echo/' > ${SSH_ENV}
+  chmod 600 ${SSH_ENV}
+  . ${SSH_ENV} > /dev/null
+  /usr/bin/ssh-add;
+}
+
+# Source SSH settings, if applicable
+
+if [ -f "${SSH_ENV}" ]; then
+  . ${SSH_ENV} > /dev/null
+  ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
+    start_agent;
+  }
+else
+  start_agent;
+fi
+