Methods with percentages

It is now possible to user ‘%’ characters.
ex:
view.pin.top().left(25%).width(25%).height(100%)

• width(_ percent: Percent)
• height(_ percent: Percent)
• size(_ percent: Percent)
• top(_ percent: Percent)
• left(_ percent: Percent)
• bottom(_ percent: Percent)
• right(_ percent: Percent)
• hCenter(_ percent: Percent)
• vCenter(_ percent: Percent)

Plus:

• size(_ sideLength: CGFloat)
• Implement hCenter() & vCenter()
• Implement margin(_ vertical: CGFloat, _ horizontal: CGFloat) & margin(_ top: CGFloat, _ horizontal: CGFloat, _ bottom: CGFloat)
• Add more unit tests
• Removed few forced optionals
• Removed deprecated UIView+PinLayout extension.

0.0.2: Merge pull request #14 from mirego/rename_v2

Renamed to PinLayout

Initial release

Merge pull request #12 from mirego/update

Multi changes