Added routing for the uploader button and form

Thanks to @rockwood for help
Corrected form_tag path to 'students' rather than 'student'
FIXED upload params typo
Added model student_uploader to intialize and read file

I wanted to make this just uploader.rb and allow it to be the general
uploaded but it appears that the file name must match the class name
with snake_case matching the CamelCase