Merge pull request #49 from luixxiul/development

PRs from #44 to #48
Merge pull request #51 from luixxiul/development

uk-icon-facebook: color #fff
Merge pull request #53 from luixxiul/development

minor revision, jhering
Merge pull request #55 from luixxiul/development

missing quotation mark added, unnecessary lines deleted
Merge branch 'master' into development