Support storage of teacher image files

[Brian Lewis]

Allow image file to be associated with a teacher. An image file can be flagged with a category (portrait, certificate, transcript)

1) Implement data model in SQL 2) implement file system logic for document storage 3) Install ImageProcessor.Web 4) Implement imageprocessor interface to retrieve from file system 5) implement datalayer : searching for images by teacher, category, upload date 6) implement file upload 7) implement teacher image gallery

SPC requirement

[Ghislain Hachey]

Cleaning up...