Adds cocoapods for libraries.

Adds OCMockito and OCHamcrest libs.

Pods/OCHamcrest/Source/Library/Number/HCIsCloseTo.m

@@ -0,0 +1,69 @@
+//  OCHamcrest by Jon Reid, https://qualitycoding.org/
+//  Copyright 2019 hamcrest.org. See LICENSE.txt
+
+#import "HCIsCloseTo.h"
+
+
+@interface HCIsCloseTo ()
+@property (nonatomic, assign, readonly) double value;
+@property (nonatomic, assign, readonly) double delta;
+@end
+
+@implementation HCIsCloseTo
+
+- (id)initWithValue:(double)value delta:(double)delta
+{
+    self = [super init];
+    if (self)
+    {
+        _value = value;
+        _delta = delta;
+    }
+    return self;
+}
+
+- (BOOL)matches:(nullable id)item
+{
+    if ([self itemIsNotNumber:item])
+        return NO;
+
+    return [self actualDelta:item] <= self.delta;
+}
+
+- (double)actualDelta:(id)item
+{
+    return fabs([item doubleValue] - self.value);
+}
+
+- (BOOL)itemIsNotNumber:(id)item
+{
+    return ![item isKindOfClass:[NSNumber class]];
+}
+
+- (void)describeMismatchOf:(nullable id)item to:(nullable id <HCDescription>)mismatchDescription
+{
+    if ([self itemIsNotNumber:item])
+        [super describeMismatchOf:item to:mismatchDescription];
+    else
+    {
+        [[[mismatchDescription appendDescriptionOf:item]
+                               appendText:@" differed by "]
+                               appendDescriptionOf:@([self actualDelta:item])];
+    }
+}
+
+- (void)describeTo:(id <HCDescription>)description
+{
+    [[[[description appendText:@"a numeric value within "]
+                    appendDescriptionOf:@(self.delta)]
+                    appendText:@" of "]
+                    appendDescriptionOf:@(self.value)];
+}
+
+@end
+
+
+id HC_closeTo(double value, double delta)
+{
+    return [[HCIsCloseTo alloc] initWithValue:value delta:delta];
+}