Setup Composer and Twig, first commit of actual code

This commit includes the setup of Composer and Twig, and the inclusion of a basic bootstrap template. Wrote a TRDatabase class (not included in repo) to handle database connections and schema setup. Added two model classes, Log and User, which represent the time logs to be stored and the user information for access. Started a basic layout that includes a header and footer, as well as an index file to be rendered. Created an index.php file for landing page, which calls for the rendering of the index.html template file.