C: change phone-number to exercism V3

c/phone-number/README.md

@@ -1,5 +1,10 @@
 # Phone Number
 
+Welcome to Phone Number on Exercism's C Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
 Clean up user-entered phone numbers so that they can be sent SMS messages.
 
 The **North American Numbering Plan (NANP)** is a telephone numbering system used by many countries in North America like the United States, Canada or Bermuda. All NANP-countries share the same international country code: `1`.
@@ -28,40 +33,24 @@ should all produce the output
 
 **Note:** As this exercise only deals with telephone numbers used in NANP-countries, only 1 is considered a valid country code.
 
-## Getting Started
-
-Make sure you have read the "Guides" section of the
-[C track][c-track] on the Exercism site. This covers
-the basic information on setting up the development environment expected
-by the exercises.
-
-## Passing the Tests
-
-Get the first test compiling, linking and passing by following the [three
-rules of test-driven development][3-tdd-rules].
-
-The included makefile can be used to create and run the tests using the `test`
-task.
-
-    make test
-
-Create just the functions you need to satisfy any compiler errors and get the
-test to fail. Then write just enough code to get the test to pass. Once you've
-done that, move onto the next test.
-
-As you progress through the tests, take the time to refactor your
-implementation for readability and expressiveness and then go on to the next
-test.
-
-Try to use standard C99 facilities in preference to writing your own
-low-level algorithms or facilities by hand.
-
 ## Source
 
-Event Manager by JumpstartLab [http://tutorials.jumpstartlab.com/projects/eventmanager.html](http://tutorials.jumpstartlab.com/projects/eventmanager.html)
+### Created by
 
-## Submitting Incomplete Solutions
-It's possible to submit an incomplete solution so you can see how others have completed the exercise.
+- @RealBarrettBrown
 
-[c-track]: https://exercism.io/my/tracks/c
-[3-tdd-rules]: http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd
+### Contributed to by
+
+- @bcc32
+- @Gamecock
+- @gea-migration
+- @h-3-0
+- @mikewalker
+- @patricksjackson
+- @QLaille
+- @ryanplusplus
+- @wolf99
+
+### Based on
+
+Event Manager by JumpstartLab - http://tutorials.jumpstartlab.com/projects/eventmanager.html