Create CONTRIBUTING.md

Author: not-nef

docs/CONTRIBUTING.md

@@ -0,0 +1,24 @@
+## Contributing to txt2
+
+Start off by creating a fork of the repository on github.
+Then clone this fork with git:
+
+```git clone https://github.com/your_username/txt2```
+
+And checkout to a new branch:
+
+```git checkout -b my_new_feature```
+
+Now open the generated txt2 folder with a code editor of your choice and make your edits.
+Then stage your changes:
+
+```git add .```
+
+And commit and push:
+
+```
+git commit -m "My New Feature"
+git push
+```
+
+Now create a pull request on the txt2 repo.