Added license field

Cargo.toml

@@ -10,6 +10,7 @@ repository = "https://github.com/fulmicoton/tantivy"
 
 readme = "README.md"
 keywords = ["search", "information", "retrieval"]
+license = "MIT"
 
 [dependencies]
 #tantivy = { path = "../tantivy" }
@@ -18,7 +19,7 @@ time = "0.1.34"
 iron = "0.4"
 staticfile = "0.3.0"
 rustc-serialize = "0.3.16"
-persistent="*"
+persistent="0.2.0"
 clap = "2"
 ansi_term = "0.8.0"
 urlencoded = "0.4"

README.md

@@ -199,4 +199,9 @@ You can run it with the following command.
 
 By default, the server is serving on the port `3000`.
 
+You can search for the top 20 most relevant documents for the query `Barack Obama` by accessing
+the following [url](http://localhost:3000/api/?q=barack+obama&explain=true&nhits=20) in your browser
+
+    http://localhost:3000/api/?q=barack+obama&explain=true&nhits=20
+