Make purpose more clear on home pae

[stevenfeuerstein]

The home page needs to both (a) project the fun/silliness of DinoDate (Strength in numbers and Based on science) and (b) the serious aspect (Learning Platform). Right now they are blended, and it is hard to tell what is what.

Please make very clear that this is primarily about learning how to leverage Oracle DB for appdev.

Also, Home does not take you home.