added save method, ultimately will have all models reference this to promote code reuse for all models (a new model will no longer require its own save method)
changes to save method for insert and update to work properly
forgot to change table to variable in insert query
save now uses inherited method
rearranging of CSS, now generated using Sass
added 2 abstract find methods (by id and by given parameter)
redirect no longer uses URL so you can pass in relative paths or absolute URLs