Create contribute guide prototype.

CONTRIBUTING.md

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+# How to contribute
+
+## Release process
+
+To avoid contamination and gather translations 
+
+1. I or people who want to contribute open issue about new version.
+2. On any trigger for release such as new translations, new code release process starts.
+3. Review process write in below starts.
+4. On all review process ends and software runs well I release it.
+5. If no translation come, I release software without translation.
+
+## How to include translations
+
+If you modify translations, you must follow this process.
+
+### By GitHub
+
+1. Create pull request.
+2. Write message about pull request on issue about next version.
+3. Review on pull request.
+4. When translations come to arrive an agreement I merge in master.
+
+### By e-mail
+
+1. Send e-mail for me.
+2. I exchange GitHub user and author.
+3. Process goes on GitHub.
+
+## How to merge code
+
+If you modify program, you must follow this process.
+
+1. Create pull request.
+2. Write message about pull request on issue about next version.
+3. Review on pull request.
+4. When code come to  to arrive an agreement I merge in master.