Ability to set paragraph alignment

[markst]

No description provided.

[markst]

This feature can't be used in combination with #1.

Might need to add the ability to set the paragraph style such as:

func paragraphStyle(_ paragraphStyle:NSParagraphStyle, forText text:String? = nil) -> NSMutableAttributedString {
    var attributeRange:NSRange? = nil
    if let textForAttribute = text {
        attributeRange = self.getRangeOfStringInSelf(textForAttribute)
    }
    
    self.applyAttribute(NSParagraphStyleAttributeName, withValue: paragraphStyle as AnyObject, forRange: attributeRange)
    
    return self
}