[DOC] add example to computed properties set in API
removed hyperlink from 'see' in README.md
[DOC] Fix example code syntax in code comment
Merge pull request #5583 from tricknotes/fix-example

[DOC] Fix example code syntax in code comment
Merge pull request #5572 from sachin004/readme_contri_hl_fix

removed hyperlink from 'see' in README.md
[DOC release] API documentation for Query Params. #5460
Merge pull request #5538 from mikepmunroe/computed-set-api-example

[DOC] add example to computed properties set() in API docs
fixed duplicate imports / exports, importing none existent values and accidentally importing default value instead of specific export
removed circular dependencies between ember-metal/properties and ember-metal/property_set
Merge pull request #5586 from yonjah/es6-circular

ES6 circulare dependencies in ember-metal properties and property_set
Merge pull request #5585 from yonjah/es6-lint

es6 lint to improve ES6 compatability
Fix for #5579