Created news letter model
Created pdf uploader
Migrated database for pdf news letters
Added extension whitelist to pdf uploader

Now only accepts .pdf files
Mounted pdf uploader to news letter model
News letter now under control of active admin gem
Added accepted parameters to active admin news letters
Modified news letters table title column to be a string

Used a database migration file
First pdf file upload
Display current news letters in corresponding page

Use local variable in the core controller to get the news letters from
the database.

Clicking on the link will trigger a download of the pdf news letter file.

Currently in Chrome the pdf will open up in the browser and will not be
downloaded to the user specified path.