Updating includes to not use namespace

This relates to #24
Switching captions to legends for fieldsets

Related to #26
Fixing CSS selector tests

Related to #26
Adding PropertySetPresenter#legend

Given that there is a legend dom element, creating the #legend method
to reduce disonnance.
Adding hint text for properties

If hint text is available for properties, render that information for
edit/new forms. Otherwise don't render it.

Is it possible that this information should be present in the show
view?

Related to #21
Merge pull request #27 from ndlib/adding-help-to-properties

Adding hint text for properties
Adding dom helper methods to PropertyPresenter

I want a uniform way of updating the attributes for presentation.

Related to #20