Inserted Classes for Putting Images and Retrieving 20 Images

Images class has been created which storees the word, url, category,
frequency, length and imageability of the images. There are getters for
each image variable.

Images have been inserted and retrieved using the Images_SDB Class, and
Images_SDB.returnImages(String Category);
can be used to get 20 images of a category. This method returns a list
of 20 image objects, and front-end can use this in displaying images in
the same order.

Both these classes have been added to src/edu.cis350.mosstalkwords
and the necessary jar files have been added to the Library and
buildpath has been configured.