Include attachments when exporting database (optional).

Ability to include attachments when exporting a database.

Includes ability to show a checkbox vs textbox now within the
taskinputs, using a datatemplate selector. Can be easily extended to
show drop downs etc.. in future releases.
![attachments](https://f.cloud.github.com/assets/957896/140936/f94ed09e-7233-11e2-8001-3a0d82a81326.png)