Add a GetCourses(IList<ICourseID> courseIDs) call

[cmshawns]

The Class Schedule needs a way to retrieve information for specific Courses. This feature will be used to provide academic department sites with a listing of Courses in their program.

Fields required by the department site:

• Number
• Title
• CourseID
• Subject
• Descriptions
• Credits
• IsCommonCourse

NOTE: The Class Schedule can probably provide this functionality by passing a list of Subjects, but adding this call would narrow the data down even further.