WIP fix rar file extraction

Also, starting to break up into smaller functions

README.md

@@ -0,0 +1,37 @@
+# modmapper
+
+Downloads mods from nexus, parses the plugins inside, and saves data to a postgres database.
+
+## Development Install
+
+1. Install and run postgres.
+2. Create postgres user and database (and add uuid extension while you're there
+   ):
+
+```
+createuser modmapper
+createdb modmapper
+sudo -u postgres -i psql
+postgres=# ALTER DATABASE modmapper OWNER TO modmapper;
+\password modmapper
+
+# Or, on Windows in PowerShell:
+
+& 'C:\Program Files\PostgreSQL\13\bin\createuser.exe' -U postgres modmapper
+& 'C:\Program Files\PostgreSQL\13\bin\createdb.exe' -U postgres modmapper
+& 'C:\Program Files\PostgreSQL\13\bin\psql.exe' -U postgres
+postgres=# ALTER DATABASE modmapper OWNER TO modmapper;
+\password modmapper
+```
+
+3. Save password somewhere safe and then and add a `.env` file to the project
+   directory with the contents:
+
+```
+DATABASE_URL=postgresql://modmapper:<password>@localhost/modmapper
+```
+
+4. Install
+   [`sqlx_cli`](https://github.com/launchbadge/sqlx/tree/master/sqlx-cli) with
+   `cargo install --version=0.1.0-beta.1 sqlx-cli --no-default-features --features postgres`
+5. Run `sqlx migrate --source migrations run` which will run all the database migrations.