Add breadcrumb nav elements to campaign pages

New nav elements have not been styled.
Add breadcrumb nav elements to character pages
Style new breadcrumb nav elements
Use CSS more selectively.

Do not import rules for styling tables in every single page. Instead, only
import rules as necesssary.
Add nav links for editing and deleting objets.

Links allow a user to edit or delete an object when viewing that object's page.
For example, when at the character/15/traits/ page, there is an "Edit" link
leading to character/15/traits/update-form/ page.

Style the new elements.
Remove unnecessary block from template
Clean up tables of information

Do not display object ID numbers in tables. Ensure that the "name" column (or
similar) is always displayed first in tables.
Add links to character-related pages.

Add the following paragraph to the character-id.html template:

    This character has N hit locations, N unique possessions, N skills, N spells
    and N traits.

This paragraph contains hyperlinks to each of the relevant pages.
Add default values into character-id.html template
Update css

Use a tiled image for the site background. Make the body background white and
slightly transparent, change the color of the header border, and add a border to
the footer.