Fixed broken links

Author: z3t0

README.md

@@ -19,15 +19,15 @@ If you want to contribute to this project:
 ## Contributors
 These are the active contributors of this project that you may contact if there is anything you need help with or if you have suggestions. 
 
-- [z3t0](github.com/z3t0) : Active Contributor and currently also the main contributor.
+- [z3t0](https://github.com/z3t0) : Active Contributor and currently also the main contributor.
   * Email: [email protected]
   * Skype: polarised16
-- [shirriff](github.com/shirriff) : Owner of repository and creator of library.
-- [Informatic](github.com/Informatic) : Active contributor
-- [fmeschia](github.com/fmeschia) : Active contributor
-- [PaullStoffregen](github.com/paullstroffregen) : Active contributor
+- [shirriff](https://github.com/shirriff) : Owner of repository and creator of library.
+- [Informatic](https://github.com/Informatic) : Active contributor
+- [fmeschia](https://github.com/fmeschia) : Active contributor
+- [PaulStoffregen](https://github.com/paulstroffregen) : Active contributor
 
-Note: This list is being updated constantly so please let @z3t0 know if you have been missed.
+Note: This list is being updated constantly so please let [z3t0](https://github.com/z3t0) know if you have been missed.
 
 ## Copyright
 Copyright 2009-2012 Ken Shirriff