dependency management implemented -- this should be polished later to say the task name in the exception message. last feature to implement is logging.

conf/config.json

@@ -1,4 +1,5 @@
 {
   "units_path":	"/home/phanes/development/internal/Examplar/conf/units/all_test.units",
-  "plan_path":  "/home/phanes/development/internal/Examplar/conf/plans/test.plan"
+  "plan_path":  "/home/phanes/development/internal/Examplar/conf/plans/test.plan",
+  "config_version": "1"
 }

conf/plans/test.plan

@@ -2,6 +2,6 @@
   "plan": [
     { "name": "independent test 1", "dependencies":  [ null ] },
     { "name": "independent test 2", "dependencies":  [ null ] },
-    { "name": "dependent test", "dependencies":  [ "independent test 1", null, null ] }
+    { "name": "dependent test", "dependencies":  [ "independent test 1" ] }
   ]
 }

conf/units/all_test.units

@@ -5,13 +5,13 @@
       "target":     "/usr/bin/false",
       "rectifier":  "/usr/bin/true",
       "active":     true,
-      "required":   true,
+      "required":   false,
       "rectify":    true
     },
     {
       "name":       "independent test 2",
-      "target":     "/usr/bin/false",
-      "rectifier":  "/usr/bin/false",
+      "target":     "/usr/bin/true",
+      "rectifier":  "/usr/bin/true",
       "active":     true,
       "required":   false,
       "rectify":    false
@@ -26,7 +26,7 @@
     },
     {
       "name":       "dependent test",
-      "target":     "ssh root@phanes.silogroup.org",
+      "target":     "/usr/bin/true",
       "rectifier":  "/usr/bin/false",
       "active":     true,
       "required":   false,