Added dot-env plugin

Dot-env is a cross-platform, cascading Zsh environment system for those who work on different hardware and OS environments.

See: https://github.com/midwire/.env

plugins/dot-env/dot-env.plugin.zsh

@@ -0,0 +1,53 @@
+# Skip all this for non-interactive shells
+[[ -z "$PS1" ]] && return
+
+export DOT_ENV_PATH="$( cd "$( dirname "${0}" )" && pwd )"
+
+OS=`uname`
+if [[ $OS == 'Darwin' ]]; then
+	x=1
+elif [[ $OS == 'SunOS' ]]; then
+	x=1
+elif [[ $OS == 'Linux' ]]; then
+	x=1
+else
+	echo "Sorry, no portable environment support for your platform: '$OS'"
+	exit 1
+fi
+OS_DIR=$DOT_ENV_PATH/os/$OS
+
+# Make sure globals are sourced before OS specifics
+if [[ "$SHLVL" == "1" ]]; then
+	echo "Sourcing Global Environment"
+fi
+for i in $DOT_ENV_PATH/global/global_*.sh ; do
+  if [ -r "$i" ]; then
+  	. $i
+  fi
+done
+
+# Now source OS specifics
+if [[ "$SHLVL" == "1" ]]; then
+	echo "Sourcing $OS Environment"
+fi
+for i in $OS_DIR/*.sh ; do
+  if [ -r "$i" ]; then
+  	. $i
+  fi
+done
+
+# Source Host specifics if there are any for the current host
+if [[ ! -z "$HOST" ]]; then
+	HOST_DIR=$DOT_ENV_PATH/host/`hostname`
+	if [[ "$SHLVL" == "1" ]]; then
+		echo "Sourcing '$HOST' Environment"
+	fi
+	for i in $HOST_DIR/*.sh ; do
+	  if [ -r "$i" ]; then
+	  	. $i
+	  fi
+	done
+fi
+
+unset i
+