Added Debug and testing documentation (#37)
* Removed old "Contribution" page. Replaced with "A Beginners guide to
Contributing" page.
* Added the "Directed Testers" pages.
* Changed id from "debugging" to "debugging_and_testing".
* Added "Trace-based Debugging" documentation.
* Added "Debugger-based Debugging" documentation.
* Added "Debugging Simulated Code" documentation.
* Fixed some formatting and naming misakes in trace-based debug
* src -> `src`
* Added Valgrind documentation to debugger-based debug doc
* Moved "Debugging and Testing" to general docs.
7 files changed