Added Examples.md for new users

[TheNeoStormZ]

I have made a simple Java file (JSONExamples.java, ubicated in src/main/java/org.json) in which i explain how to get started with all the JSON-types and how to use all conversors to new-comers.

[kushieda-minori]

Please rename the file EXAMPLES.md and place in the root of the project. Also surround the code with

```java
package org.json;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

//This class' intention is to explain to new-comers the basics of this project
public class JSONExamples {
    // ACTUAL EXAMPLES HERE
}
```

We don't really want the examples compiled into the release jar. Having it as a Markdown file will also make it easy to read.

[johnjaylward]

move to a markdown file.

[TheNeoStormZ]

Done! It should be changed now. I have also tweaked the file a little bit so it looks good in Markdown

[stleary]

What problem does this code solve?
Project needs documentation to help new users come up to speed.

Risks
None, but need to review the code for syntax, clarity, completeness.

Changes to the API?
No

Will this require a new release?
No

Should the documentation be updated?
Yes, the new markdown file will need to be navigable from the README.

Does it break the unit tests?
No

Was any code refactored in this commit?
No

Review status
ACCEPTED

[stleary]

@TheNeoStormZ Nice work, thanks for putting in the effort.

This PR is approved. Noting here some possible improvements for future pull requests:

• I think JSONExampleTokener is incomplete, throws an exception.
• JavaDocs should be written for the functions
• An enclosing class should be provided, e.g. JSONJavaDemo.
• .md headers and text should be commented, so that users can easily copy and paste the entire document into a Java file. For example, // Part 2: Conversion methods
• The function calls in main() should all be uncommented
• Additional text should be provided explaining the purpose of each class.
• Text should be included on how to compile and run this code
• Add these mandatory imports:

import org.json.CDL;
import org.json.Cookie;
import org.json.HTTP;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONStringer;
import org.json.JSONTokener;
import org.json.JSONWriter;
import org.json.Property;
import org.json.XML;