HRSPLT-170 Benefit Confirmations are Benefit Statements

Per [HRSPLT-170](https://jira.doit.wisc.edu/jira/secure/RapidBoard.jspa?rapidView=121&view=detail&selectedIssue=HRSPLT-170) : Instead of showing Benefit Confirmations as their own tab read from their own web service using their own JAXB-generated domain model, instead benefit confirmations are just a flavor of plain old Benefit Statements presented on the existing Statements tab and read from the existing Benefit Statements web service and modeled using the existing Benefit Statements JAXB generated domain model.

 * Removes the Benefit-Confirmations-specific code.
 * Removes the Confirmations tab from the UI.
 * The DAO now logs the benefit statements it receives from the web service at `DEBUG` level.
 * Fixes a bug that the Benefit Confirmations UI had introduced in the Benefit Statements table wherein the PDF download URLs were missing some necessary parameters.

This changeset also tweaks the Statements tab spacing to add one `em` more margin between the statements table and the hyperlinks below the table.

Before (tight spacing):

![crowded_before](https://cloud.githubusercontent.com/assets/952283/4483261/ee0d251e-49af-11e4-8ba2-4715dc124e02.png)

After (wider margin):

![spacious_after](https://cloud.githubusercontent.com/assets/952283/4483268/f4d975d2-49af-11e4-9071-f3a7c377db86.png)