docs(readme): improve example documentation

add headers
fix typo

example/README.md

-This is a simple example to explain how to used the GLPI API Library
+# GLPI API Client Library for Java
+
+This library specifically designed for Java, features several functionalities common to all GLPI APIs
+
+## Example
+
+This is a simple example to explain how to use the GLPI API Library
 
 Please add this script on Gradle app and Sync the project:
 
-```
+```script
 repositories {
     maven {
         url 'https://bintray.com/glpi-project/maven-repository'
@@ -10,12 +16,14 @@ repositories {
 }
 ```
 
-```
+```console
 compile 'org.glpi:api:0.1.0'@aar
 ```
 
-Now you can run your app in simulator or device then to check the log in terminal type this:
+Now you can run your app in simulator or device.
 
-```
+To check the log, type this in terminal:
+
+```console
 adb shell logcat | grep -E "org.glpi.api"
 ```
\ No newline at end of file