Improved request handling

Also:
 * Shelve -> Pickle to avoid weird db problems
 * Serving schemas and contexts

senpy/schemas/context.jsonld

@@ -1,33 +1,35 @@
 {
-  "@vocab": "http://www.gsi.dit.upm.es/ontologies/senpy#",
-  "dc": "http://dublincore.org/2012/06/14/dcelements#",
-  "me": "http://www.mixedemotions-project.eu/ns/model#",
-  "prov": "http://www.w3.org/ns/prov#",
-  "nif": "http://persistence.uni-leipzig.org/nlp2rdf/ontologies/nif-core#",
-  "marl": "http://www.gsi.dit.upm.es/ontologies/marl/ns#",
-  "onyx": "http://www.gsi.dit.upm.es/ontologies/onyx#",
-  "wnaffect": "http://www.gsi.dit.upm.es/ontologies/wnaffect#",
-  "xsd": "http://www.w3.org/2001/XMLSchema#",
-  "topics": {
-    "@id": "dc:subject"
-  },
-  "entities": {
-  "@id": "me:hasEntities"
-  },
-  "suggestions": {
-    "@id": "me:hasSuggestions"
-  },
-  "emotions": {
-    "@id": "onyx:hasEmotionSet"
-  },
-  "sentiments": {
-    "@id": "marl:hasOpinion"
-  },
-  "entries": {
-    "@id": "prov:used"
-  },
-  "analysis": {
-    "@id": "prov:wasGeneratedBy"
+  "@context": {
+    "@vocab": "http://www.gsi.dit.upm.es/ontologies/senpy#",
+    "dc": "http://dublincore.org/2012/06/14/dcelements#",
+    "me": "http://www.mixedemotions-project.eu/ns/model#",
+    "prov": "http://www.w3.org/ns/prov#",
+    "nif": "http://persistence.uni-leipzig.org/nlp2rdf/ontologies/nif-core#",
+    "marl": "http://www.gsi.dit.upm.es/ontologies/marl/ns#",
+    "onyx": "http://www.gsi.dit.upm.es/ontologies/onyx#",
+    "wnaffect": "http://www.gsi.dit.upm.es/ontologies/wnaffect#",
+    "xsd": "http://www.w3.org/2001/XMLSchema#",
+    "topics": {
+        "@id": "dc:subject"
+    },
+    "entities": {
+    "@id": "me:hasEntities"
+    },
+    "suggestions": {
+        "@id": "me:hasSuggestions"
+    },
+    "emotions": {
+        "@id": "onyx:hasEmotionSet"
+    },
+    "sentiments": {
+        "@id": "marl:hasOpinion"
+    },
+    "entries": {
+        "@id": "prov:used"
+    },
+    "analysis": {
+        "@id": "prov:wasGeneratedBy"
 
-}
+    }
+  }
 }

senpy/schemas/definitions.json

@@ -152,10 +152,14 @@
   },
   "Plugin": {
     "type": "object",
-    "required": ["@id"],
+    "required": ["@id", "extra_params"],
     "properties": {
       "@id": {
         "type": "string"
+      },
+      "extra_params": {
+        "type": "object",
+        "default": {}
       }
     }
   },