#21 adjust the pirep view/edit form

database/migrations/2017_06_28_195426_create_pireps_table.php

@@ -77,7 +77,7 @@ class CreatePirepsTable extends Migration
             $table->uuid('pirep_id');
             $table->string('name', 50);
             $table->text('value');
-            $table->tinyInteger('source')->default(0);
+            $table->string('source')->nullable();
             $table->timestamps();
 
             $table->index('pirep_id');