Adds cocoapods for libraries.

Adds OCMockito and OCHamcrest libs.

Pods/OCHamcrest/Source/Core/HCStringDescription.m

@@ -0,0 +1,45 @@
+//  OCHamcrest by Jon Reid, https://qualitycoding.org/
+//  Copyright 2019 hamcrest.org. See LICENSE.txt
+
+#import "HCStringDescription.h"
+
+#import "HCSelfDescribing.h"
+
+
+@interface HCStringDescription ()
+@property (nonatomic, strong) NSMutableString *accumulator;
+@end
+
+@implementation HCStringDescription
+
++ (NSString *)stringFrom:(id <HCSelfDescribing>)selfDescribing
+{
+    HCStringDescription *description = [HCStringDescription stringDescription];
+    [description appendDescriptionOf:selfDescribing];
+    return description.description;
+}
+
++ (instancetype)stringDescription
+{
+    return [[HCStringDescription alloc] init];
+}
+
+- (instancetype)init
+{
+    self = [super init];
+    if (self)
+        _accumulator = [[NSMutableString alloc] init];
+    return self;
+}
+
+- (NSString *)description
+{
+    return self.accumulator;
+}
+
+- (void)append:(NSString *)str
+{
+    [self.accumulator appendString:str];
+}
+
+@end