fix: Update desc for spell examples

zeppelin-examples/zeppelin-example-spell-echo/package.json

@@ -1,11 +1,15 @@
 {
   "name": "echo-spell",
-  "description": "Echo Spell (example)",
+  "description" : "Return just what receive (example)",
   "version": "1.0.0",
   "main": "index",
   "author": "",
   "license": "Apache-2.0",
   "dependencies": {
     "zeppelin-spell": "*"
+  },
+  "spell": {
+    "magic": "%echo",
+    "usage": "%echo <TEXT>"
   }
 }

zeppelin-examples/zeppelin-example-spell-echo/zeppelin-example-spell-echo.json

@@ -20,5 +20,9 @@
   "description" : "Return just what receive (example)",
   "artifact" : "./zeppelin-examples/zeppelin-example-spell-echo",
   "license" : "Apache-2.0",
-  "icon" : "<i class='fa fa-repeat'></i>"
+  "icon" : "<i class='fa fa-repeat'></i>",
+  "spell": {
+    "magic": "%echo",
+    "usage": "%echo <TEXT>"
+  }
 }

zeppelin-examples/zeppelin-example-spell-flowchart/package.json

@@ -1,6 +1,6 @@
 {
   "name": "flowchart-spell",
-  "description": "Flowchart Spell (example)",
+  "description" : "Draw flowchart using http://flowchart.js.org (example)",
   "version": "1.0.0",
   "main": "index",
   "author": "",
@@ -9,5 +9,9 @@
     "raphael": "2.2.0",
     "flowchart.js": "^1.6.5",
     "zeppelin-spell": "*"
+  },
+  "spell": {
+    "magic": "%flowchart",
+    "usage": "%flowchart <TEXT>"
   }
 }

zeppelin-examples/zeppelin-example-spell-flowchart/zeppelin-example-spell-flowchart.json

@@ -17,8 +17,12 @@
 {
   "type" : "SPELL",
   "name" : "flowchart-spell",
-  "description" : "with Flowchart.js (example)",
+  "description" : "Draw flowchart using http://flowchart.js.org (example)",
   "artifact" : "./zeppelin-examples/zeppelin-example-spell-flowchart",
   "license" : "Apache-2.0",
-  "icon" : "<i class='fa fa-random'></i>"
+  "icon" : "<i class='fa fa-random'></i>",
+  "spell": {
+    "magic": "%flowchart",
+    "usage": "%flowchart <TEXT>"
+  }
 }

zeppelin-examples/zeppelin-example-spell-markdown/package.json

@@ -1,6 +1,6 @@
 {
   "name": "markdown-spell",
-  "description": "Markdown Spell (example)",
+  "description" : "Parse markdown using https://github.com/evilstreak/markdown-js (example)",
   "version": "1.0.0",
   "main": "index",
   "author": "",
@@ -8,5 +8,9 @@
   "dependencies": {
     "markdown": "0.5.0",
     "zeppelin-spell": "*"
+  },
+  "spell": {
+    "magic": "%markdown",
+    "usage": "%markdown <TEXT>"
   }
 }

zeppelin-examples/zeppelin-example-spell-markdown/zeppelin-example-spell-markdown.json

@@ -17,8 +17,12 @@
 {
   "type" : "SPELL",
   "name" : "markdown-spell",
-  "description" : "with markdown-js (example)",
+  "description" : "Parse markdown using https://github.com/evilstreak/markdown-js (example)",
   "artifact" : "./zeppelin-examples/zeppelin-example-spell-markdown",
   "license" : "Apache-2.0",
-  "icon" : "<i class='fa fa-bold'></i>"
+  "icon" : "<i class='fa fa-bold'></i>",
+  "spell": {
+    "magic": "%markdown",
+    "usage": "%markdown <TEXT>"
+  }
 }

zeppelin-examples/zeppelin-example-spell-translator/package.json

@@ -1,6 +1,6 @@
 {
   "name": "translator-spell",
-  "description": "Translator Spell (example)",
+  "description" : "Translate langauges using Google API (examaple)",
   "version": "1.0.0",
   "main": "index",
   "author": "",
@@ -8,5 +8,9 @@
   "dependencies": {
     "whatwg-fetch": "^2.0.1",
     "zeppelin-spell": "*"
+  },
+  "spell": {
+    "magic": "%translator",
+    "usage": "%translator <source>-<target> <access-key> <TEXT>"
   }
 }

zeppelin-examples/zeppelin-example-spell-translator/zeppelin-example-spell-translator.json

@@ -17,8 +17,12 @@
 {
   "type" : "SPELL",
   "name" : "translator-spell",
-  "description" : "with Google Translation API (examaple)",
+  "description" : "Translate langauges using Google API (examaple)",
   "artifact" : "./zeppelin-examples/zeppelin-example-spell-translator",
   "license" : "Apache-2.0",
-  "icon" : "<i class='fa fa-globe '></i>"
+  "icon" : "<i class='fa fa-globe '></i>",
+  "spell": {
+    "magic": "%translator",
+    "usage": "%translator <source>-<target> <access-key> <TEXT>"
+  }
 }