Fix permission modification alerts

They weren't saying the actual permission being changed because of a restyling bit ago.
Add most utility functions into the evesrp.util scope/namespace

Makes importing utility things more consistent.
Expand Unicode utilities documentation

Read "expand" as "create".
Add a utility function for creating XML responses

Named xmlify, like Flask's jsonify, but with calling semantics like render_template.
Ensure that error responses will _always_ have something

Can't have the error handler erring out, it's getting old.
Add help text when submitting requests
Add documentation generation to the root Makefile
Extract the version for the documentation from evesrp.__version__
Add Intersphinx mapping for six
Update submission end-user instructions
Update end-user reviewer guide
Add end-user payout guide
Add end-user administrator guide
Include link to end-user documentation in footer
Release 0.8.6