Added test to see if a dict containing integers can be properly converted to an etree.

This is needed because AnyDict can be assigned plain integers instead of a list of integers.
Added test for non complex value in root dict.
Test the cases where the value is None.
Enable use of AnyDict with values that are not collections.Sized (eg. they've got no __len__ method).
Do not convert strings into an array of characters.
fix httprpc file uploads
FlatDictDocument => SimpleDictDocument
add and make array test for simple dict document pass
add test for nested arrays
make flat dict array serializer handle arrays of primitives
fix typo in array name generation. #260
minor test tweak
pass the right type to recursive call in simple dict serialization
minor
tweaked sql crud example
very minor
add warning to spyne.util.web docstring / simplify imports.
readme tweak
add crud reader/writer support
minor