Merge pull request #136 from ucsflibtopfstedt/master

updated install instructions.
updated CREATE TABLE statement for "program_year_director" so that it includes fkeys constraints. refs #3234
added migration for adding fkey constraints to "program_year_director" table. refs #3234
bumped migration version. refs #3234
Merge pull request #137 from ucsflibtopfstedt/feat3234

added fkeys to table "program_year_director"