Styled "Administrador de Cursos" landing page
Added proper spanish characters (á, é, í, ó, ú, ñ) to messages where required
Fixed style for general links (#content) . 
Fixed style for "Agregar curso" link in "Administrador de Cursos".
Removed default DataTable css from "Administrador de Cursos" view.
Merge pull request #16 from elpesci/develop

Styled "Administrador de Cursos". Added spanish language characters.