examples: Add more examples and clean up some

examples/lang/class-include.mcl

@@ -0,0 +1,22 @@
+import "fmt"
+class foo {
+	print "foo1" {
+		msg => "inside foo",
+
+		Meta:autogroup => false,
+	}
+}
+
+class bar($a, $b) { # a parameterized class
+	print "bar-"+ $a {
+		msg => fmt.printf("inside bar: %s", $b),
+
+		Meta:autogroup => false,
+	}
+}
+
+include foo
+include foo			# duplicate
+include bar("b1", "hello")
+include bar("b2", "world")
+include bar("b2", "world")	# duplicate

examples/lang/duplicate-error.mcl

@@ -0,0 +1,8 @@
+# this combination should error
+pkg "cowsay" {
+        state => "uninstalled",
+}
+
+pkg "cowsay" {
+        state => "installed",
+}

examples/lang/duplicate.mcl

@@ -0,0 +1,7 @@
+pkg "cowsay" {
+        state => "newest",
+}
+
+pkg "cowsay" {
+        state => "installed",
+}

examples/lang/env-bad.mcl

@@ -0,0 +1,8 @@
+import "fmt"
+import "sys"
+
+$x = sys.getenv("TEST", "321")
+
+print "print1" {
+	msg => fmt.printf("TEST is: %s", $x),
+}

examples/lang/iteration1.mcl

@@ -0,0 +1,21 @@
+# single resource
+print "name" {}
+
+# single resource, defined by list variable
+$names = ["hey", "there",]
+print $names {
+	Meta:autogroup => false,
+}
+
+# multiples resources, defined by list
+print ["hello", "world",] {
+	Meta:autogroup => false,
+	Depend => Print[$names],
+}
+
+$morenames = ["wow", "cool", "amazing",]
+print $morenames {
+	Meta:autogroup => false,
+}
+
+Print[$names] -> Print[$morenames]

examples/lang/nspawn1.mcl

@@ -0,0 +1,3 @@
+nspawn "sid-chroot" {
+	state => "running",
+}

examples/lang/nspawn2.mcl

@@ -0,0 +1,3 @@
+nspawn "Fedora-Cloud-Base-27-1.6.x86_64" {
+	state => "running",
+}

examples/lang/readfile1.mcl

@@ -1,6 +1,6 @@
 import "os"
 
-# this copies the contents from /tmp/foo and puts them in /tmp/output
+# this copies the contents from /tmp/input and puts them in /tmp/output
 file "/tmp/output" {
-	content => os.readfile("/tmp/foo"),
+	content => os.readfile("/tmp/input"),
 }