Updated readme

README.md

@@ -2,15 +2,24 @@
 
 A time table manager with a beautiful material design.
 
-# How does it work?
+## How does it work?
 
 TiTaMa uses a MySQL database to store the timetable. For web interface PHP is used.
 
-# What are the features?
+## What are the features?
 
  - Single page user interface
  - Responsive design
 
-# HHVM
+## HHVM
 
 This page works also with HHVM
+
+## Contributing
+
+1. Fork it
+2. Create a feature branch with a meaningful name (`git checkout -b my-new-feature`)
+3. Add yourself to the CONTRIBUTORS file
+4. Commit your changes (`git commit -am 'Add some feature'`)
+5. Push to your branch (`git push origin my-new-feature`)
+6. Create a new pull request