Renamed readme file and fix case inconsistency in filename

Author: Kameshwaran

docs/client/components/common/DefaultCode/index.js

@@ -1,3 +1,2 @@
-
-export { defaultCode as CardDefaultCode } from './card';
-export { defaultCode as ButtonDefaultCode } from './button';
+export { defaultCode as CardDefaultCode } from './Card';
+export { defaultCode as ButtonDefaultCode } from './Button';

src/button/readme.md renamed to src/button/readMe.md

@@ -60,4 +60,4 @@ The base button component.
       <Button type="success" icon="done" iconAlignment="right">Right Icon</Button>
     </div>
   </div>
-```
+```