Work with mongodb-native 1.3.x

Change-Id: Ib2cc33187e3e7bf98ae0631368e00735c0cf5568
Allow passing server configuration to connect-mongo directly.
Merge pull request #72 from llun/master

Allow configure server option directly by passing server in options
Merge in #68
Bump to 0.4.0
propagate the original connection error, including reason and stack.
Merge pull request #90 from mk-pmb/connect-error-reason

propagate the original connection error, including reason and stack.