support json, jsonnet, yaml formats

- jsonnet, json and yaml support for configuration
- json and yaml support for output formats

fix #40
fix #27

config/reaction.test.jsonnet

@@ -0,0 +1,30 @@
+{
+  patterns: {
+    num: {
+      regex: '[0-9]+',
+    },
+  },
+
+  streams: {
+    tailDown1: {
+      cmd: ['sh', '-c', "echo 1 2 3 4 5 1 2 3 4 5 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 | tr ' ' '\n' | while read i; do sleep 2; echo found $(($i % 10)); done"],
+      filters: {
+        findIP: {
+          regex: ['^found <num>$'],
+          retry: 3,
+          retryperiod: '30s',
+          actions: {
+            damn: {
+              cmd: ['echo', '<num>'],
+            },
+            undamn: {
+              cmd: ['echo', 'undamn', '<num>'],
+              after: '30s',
+              onexit: true,
+            },
+          },
+        },
+      },
+    },
+  },
+}