Make LinkBuilder.BuildUri case insensitive.

Make LinkBuilder.BuildUri property look-up on the model case insensitive
so links in the UriTemplate do not have to match the case of the property.
Change LinkBuilder prop search to case-sensitive

Change property look-up in the LinkBuilder to default to case-sensitive
search and fallback to case-insensitive search.
Merge pull request #98 from jjvdangelo/links-case-sensitive

Make LinkBuilder.BuildUri case insensitive.