Removed duplication of cotributing description

Author: sensorario

CONTRIBUTING.md

@@ -1,8 +1,13 @@
 # How to become contributor
 
+This plugin is very easy, there is a lot of space for community update, feedback and features request. Help this
+project with issues and PRs!
+
  * fork the project
  * apply your changes
  * ensure that your code work
  * update README.md file
  * upfate also doc/composer.txt file
  * send a pull request
+
+Thanks!

README.md

@@ -59,9 +59,3 @@ If this check fails you can try to force correct path
 ```
 let g:composer_cmd = "/usr/bin/composer"
 ```
-
-## Contrib
-This plugin is very easy, there is a lot of space for community update, feedback and
-features request.
-Help me with issues and PRs!
-Thanks!