Fix camel case in strings

Fix issue #2

Author: laurentdavid

lang/en/block_featured_courses.php

@@ -26,6 +26,6 @@
 $string['config:selectedcourses'] = 'Selected course {no}';
 $string['featured_courses:addinstance'] = 'Add a featured_courses block';
 $string['featured_courses:myaddinstance'] = 'Add a featured_courses block to my moodle';
-$string['pluginname'] = 'Featured Courses';
+$string['pluginname'] = 'Featured courses';
 $string['removelastcourses'] = 'Remove last course';
-$string['viewcourse'] = 'View Course';
+$string['viewcourse'] = 'View course';