Remove .gradle files from .gitignore

README also edited

.gitignore

@@ -1,5 +1,4 @@
 *.iml
-.gradle
 /.idea
 /local.properties
 /.idea/workspace.xml

README.md

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 I had completed 70% of the Sunshine app almost 3 months. I've started the android developer nanodegree course in Udacity
  and found they used the same app to teach. I was in a dilemma of whether to skip forward and get going with projects. But, I decided to
- redo the Sunshine app from the beginning to review my knowledge.
+ redo the Sunshine app from the beginning to review my knowledge.
+
+ **Build steps**
+ 1. Clone the repository
+ 2. Create gradle.properties in the root folder
+ 3. Initialize the following variable in the file
+
+    `MyOpenWeatherMapApiKey = "[YOUR_API_KEY_HERE]"`
+
+    You can get an API_KEY from <a href="http://openweathermap.org">Open Weather</a>
+
+   Please report issues with log errors if not possible, screenshots will do.