0.3.0

Add more properties for customization: titleFont, subtitleFont and actionTitleFont
Add the property placeholdersAlwaysBounceVertical to allow/disable vertical bouncing when the placeholder is shown
Start supporting iOS 8
Add ability to show/Hide tableHeader & tableFooter when the placeholders are shown
Use adjustedContentInset instead of contentInset for iOS 11 and later (compatibility iPhone X)