readme with instructions

README.md

@@ -1,2 +1,22 @@
 # goTweetsAnalyze
 twitter analyzer written in Go lang
+
+needs a .json file with the content:
+```
+{
+    "consumer_key": "xxxxxxxxxxxxxxxx",
+    "consumer_secret": "xxxxxxxxxxxxxxxx",
+    "access_token_key": "xxxxxxxxxxxxxxxx",
+    "access_token_secret": "xxxxxxxxxxxxxxxx"
+}
+
+```
+
+to run it:
+- go to the /build folder
+- open terminal
+- execute the script with:
+```
+./goTweetsAnalyze
+```
+- follow the instructions