README updates (apple#17)

- break up readme into separate files
- rework hedaings on Code of Conduct
- Add a CONTRIBUTORS.txt

Author: heckj

CODE-OF-CONDUCT.md

@@ -1,6 +1,6 @@
-## Code of Conduct
+# Code of Conduct
 
-### Our Pledge
+## Our Pledge
 
 In the interest of fostering an open and welcoming environment, we as
 contributors and maintainers pledge to making participation in our
@@ -10,7 +10,7 @@ characteristics, gender identity and expression, level of experience,
 education, socio-economic status, nationality, personal appearance,
 race, religion, or sexual identity and orientation.
 
-### Our Standards
+## Our Standards
 
 Examples of behavior that contributes to creating a positive environment
 include:
@@ -33,7 +33,7 @@ electronic address, without explicit permission
 * Other conduct which could reasonably be considered inappropriate in a
 professional setting
 
-### Our Responsibilities
+## Our Responsibilities
 
 Project maintainers are responsible for clarifying the standards of
 acceptable behavior and are expected to take appropriate and fair
@@ -45,7 +45,7 @@ contributions that are not aligned to this Code of Conduct, or to ban
 temporarily or permanently any contributor for other behaviors that they
 deem inappropriate, threatening, offensive, or harmful.
 
-### Scope
+## Scope
 
 This Code of Conduct applies within all project spaces, and it also
 applies when an individual is representing the project or its community
@@ -55,7 +55,7 @@ official social media account, or acting as an appointed representative
 at an online or offline event. Representation of a project may be
 further defined and clarified by project maintainers.
 
-### Enforcement
+## Enforcement
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may
 be reported by contacting the open source team at
@@ -70,7 +70,7 @@ Project maintainers who do not follow or enforce the Code of Conduct in
 good faith may face temporary or permanent repercussions as determined
 by other members of the project’s leadership.
 
-### Attribution
+## Attribution
 
 This Code of Conduct is adapted from the
 [Contributor Covenant](https://www.contributor-covenant.org), version 1.4, 

CONTRIBUTORS.txt

@@ -0,0 +1,5 @@
+This file contains a list of contributors who have made meaningful changes to this repository.   
+Please add your name and GitHub handle to this file as an optional step in the contribution process for attribution.   
+Email is not required.
+
+### Contributors