Added 1.6.3 release notes to read me
Added unit test for #537
Removed quote trimming which is now done by CSS parsing, fixes #537
Added comment for #537 unit test
Merge branch 'od/issue_537' into develop
Added unit test for #538
Added additional unit test for #538
Check font family for validity, fixes #538
Merge branch 'od/issue_538' into develop