Include configuration update (Breaking)

Included in this release:

• UI: Removed list of file numbers used for testing.
• Parser: Modified include behavior to require setting allowed paths.
• Parser: Increases security by disallowing including from outside allowed paths.
• Manager: Added include paths via DocsManager::addIncludePath().
• Manager: Added the DocsConfig class to handle configuration options.

Breaking changes

• Include files are no longer relative to the document, but to the
  configured include paths.
• Include paths must be set via the new DocsConfig class instead
  of the parser class.