Add API to pin edges to superview edges

- Expose a variant of `-autoPinEdgesToSuperviewEdgesWithInsets:` that
omits the insets parameter, defaulting to zero insets.

Fixes #76

PureLayout/PureLayout/ALView+PureLayout.h

@@ -104,6 +104,9 @@
 /** Pins the given edge of the view to the same edge of its superview with an inset as a maximum or minimum. */
 - (NSLayoutConstraint *)autoPinEdgeToSuperviewEdge:(ALEdge)edge withInset:(CGFloat)inset relation:(NSLayoutRelation)relation;
 
+/** Pins the edges of the view to the edges of its superview. */
+- (NSArray *)autoPinEdgesToSuperviewEdges;
+
 /** Pins the edges of the view to the edges of its superview with the given edge insets. */
 - (NSArray *)autoPinEdgesToSuperviewEdgesWithInsets:(ALEdgeInsets)insets;
 

PureLayout/PureLayout/ALView+PureLayout.m

@@ -376,6 +376,16 @@ - (NSLayoutConstraint *)autoPinEdgeToSuperviewEdge:(ALEdge)edge withInset:(CGFlo
     return [self autoPinEdge:edge toEdge:edge ofView:superview withOffset:inset relation:relation];
 }
 
+/**
+ Pins the edges of the view to the edges of its superview.
+ 
+ @return An array of constraints added.
+ */
+- (NSArray *)autoPinEdgesToSuperviewEdges
+{
+    return [self autoPinEdgesToSuperviewEdgesWithInsets:ALEdgeInsetsZero];
+}
+
 /**
  Pins the edges of the view to the edges of its superview with the given edge insets.
  The insets.left corresponds to a leading edge constraint, and insets.right corresponds to a trailing edge constraint.

README.md

@@ -37,7 +37,7 @@ Additionally, there is one generic attribute type, `ALAttribute`, which is effec
 	- autoCenterInSuperviewMargins: // iOS 8.0+ only
 	- autoAlignAxisToSuperviewMarginAxis: // iOS 8.0+ only
     - autoPinEdgeToSuperviewEdge:(withInset:)
-    - autoPinEdgesToSuperviewEdgesWithInsets:(excludingEdge:)
+    - autoPinEdgesToSuperviewEdges(WithInsets:)(excludingEdge:)
 	- autoPinEdgeToSuperviewMargin: // iOS 8.0+ only
 	- autoPinEdgesToSuperviewMargins(ExcludingEdge:) // iOS 8.0+ only
     - autoPinEdge:toEdge:ofView:(withOffset:)