README: Explain why it's better to use pre-built download
README: Explain why it's better to use pre-built download

SinnerSchraderMobileMirrors/OCMockito,nschum/OCMockito,igorsales/OCMockito,SinnerSchraderMobileMirrors/OCMockito,jonreid/OCMockito,jonreid/OCMockito,jonreid/OCMockito,igorsales/OCMockito,SinnerSchraderMobileMirrors/OCMockito,nschum/OCMockito