CS fixes using phpcs-fixer auto-correction.
Merge pull request #2126 from dereuromark/master-cs

cs fixes using phpcs-fixer auto-correction.
Updated contribution guidelines with references to GitHub
Updated README with link to GitHub Issues instead of Lighthouse
Merge pull request #2127 from ravage84/patch-2

Updated README with link to GitHub Issues instead of Lighthouse
Updated and revised links to principal resources
coding standards
Allow international domains to pass validation. Fixes #1763
Merge pull request #2130 from dereuromark/master-unicode

Allow international domains to pass validation.

Fixes #1763
Remove duplication of throws
Merge pull request #2131 from bcrowe/hotfix-cs

Remove duplication of throws
Make tests pass on win.
coding standards
Merge pull request #2134 from dereuromark/master-test-case

Make tests pass on win.
Merge branch 'master' into 2.5