new options classes and tests
Merge branch 'master' into options

Conflicts:
	classes/wp_sdl_1_0.php
	tests/WP_SDL/wp_sdl_test.php
	wp-sdl.php
Merge branch 'master' into options
Merge branch 'master' into options
Merge branch 'master' into options
implemented priority map structure to replace ad hoc hierarchy
completed registration with wp api and basic form display
new auxiliary interface
implemented new auxiliary base class
dont nest id names
dont set current child locally
tweak how auxiliary interface is implemented
config items must by unique (by type)
simplified subitem management
new abstract item class, use item factory method in config for all item instance creation
added new form mode toggle to config class
changed form mode names/strings for clarity
render settings form dependant on the config form mode
encapsulate rendering methods into new renderer classes
added wordpress api links to form mode constants