Updated mail config comments from postmark to mailgun
Merge pull request #2735 from boffey/fix-mail-config-comments

Updated mail config comments from postmark to mailgun
Cleaning up comments.
Minor cs fixes
Add fallback_locale to config

This is implemented in https://github.com/laravel/framework/commit/bf062fee1e0b67b2d646f37a7ef734ea5391c34c
Fix wording.
Merge pull request #2800 from barryvdh/patch-2

Add fallback_locale to config
Merge pull request #2754 from GrahamCampbell/fixes

Minor CS Fixes
Merge branch 'master' into develop