Updates list of contributors.

contributors.md

@@ -1,14 +1,18 @@
 # Contributors
-> Learning Locker is a community effort, this page lists those who have been involved in its development.
+> Learning Locker is a community effort sponsored by [HT2](http://ht2.co.uk), this page lists those who have been involved in its development.
 
 ## Core Contributors
-- [HT2](http://ht2.co.uk)
 - [Dave Tosh](http://twitter.com/davetosh)
 - [James Mullaney](mailto:[email protected])
 - [Ryan Smith](https://github.com/ryansmith94)
 
 ## Community Contributors
 - [James Richards](https://github.com/pondermatic)
 - [Andy Truong](https://github.com/andytruong)
-- [Andrew Downes](https://github.com/garemoko/)
+- [Andrew Downes](https://github.com/garemoko)
 - [François Moreau](https://github.com/lampyridae)
+- [Anna Smith](https://github.com/annasmith)
+- [Kazutaka Kamiya](https://github.com/kzkamiya)
+- [Pete Thorne](https://github.com/ee0pdt)
+- [Pan Luo](https://github.com/xcompass)
+- [Charyorde](https://github.com/charyorde)