Add more Task exports

Author: jbuckner

index.ts

@@ -3,7 +3,7 @@ export { File } from './src/models/file';
 export { Metadata } from './src/models/metadata';
 export { Review } from './src/models/review';
 export { SpeechMusicASREntry } from './src/models/speech-music-asr-entry';
-export { Task } from './src/models/task';
+export { Task, TaskStatus, TaskColor } from './src/models/task';
 
 // metadata field types
 export { BooleanField } from './src/models/metadata-fields/field-types/boolean';