Add top-level exception handler to blend.
Add top-level exception handler to spread.
Add top-level exception handler to tinge.
Add Content-Type to User Read.

Issues: #18
Add Access-Control-Allow-Origin to Blend::User Read.

Issues: #18
Change path parsing regexp.

Issues: #34
Update documentation for URI helper.

I have reworked the documentation for the URI helper to make it more
clear as to its function in the larger application.  This should help
with issue #34 but critique is required.
Merge branch 'master' into issues/34
Merge branch 'master' into issues/18
Merge branch 'master' into issues/9

issues:#9
Merge branch 'master' into issues/39