Some minor API tweaks to template building
Support binding of attributes to a certain type
Started work on cleaning up attributes
Attributes now uses Value as its content
Cleaning up after template refactoring
Namespace constants in Dust-class
Make sure to remove mixin attributes
Use new namespace constants
Use enum for whitespace control
Attributes mixin

Use this mixin to render any unused attributes given on the element in
the calling template.
Better documentation for TemplateBuilder
Minor tweaks to AttributeImpl
Introduced parameter namespace
Renamed webapp context namespace constant