delete request logger

- artifact middleware that made it through PR but shouldn’t have
added client middleware

- added a client middleware so that each route receives an instance of
the syscoin client irrespective of where the route is defined
sysclient calls now use req.client

client calls now use req.client
compartmentalized logger

- compartmentalized logger initialization
enhanced error handling

added enhanced error handling
removed dep on verror

removed dep on verror
split errors out to lib and middlewares
Merge pull request #4 from davidgwking/master

various enhancements