Add isVisible parameter

Update Meta files

Update README

Fixed an infinite recursion prefersStatusBarHidden()

Fixed bug which HUD doesn't respect status bar appearance.

Merge branch 'master' of github.com:krimpedance/KRProgressHUD

Update podspec

Merge pull request krimpedance#3 from krimpedance/fix_horizontalScreen

Corresponded to landscape

fixed bug: don't display glyph color

update podspec