Updated config files, added minimal config file.

samples/knot.min.conf

+system {
+  identity "Knot minimal configuration";
+  storage "/tmp/knot-minimal";
+}
+
+interfaces {
+  ipv4 { address 127.0.0.1@53533; }
+}
+
+zones {
+  example.com {  
+    file "samples/example.com.zone"; 
+  }
+}
+
+log {
+  stdout { any info, notice; }
+  stderr { any debug, warning, error; }
+  syslog {}
+  file "/tmp/knot-minimal/knotd.log" { any all; }
+}