connect GIT_USER and USER

[pridkett]

Right now there are two different vertex types GIT_USER and USER. They both can be connected to COMMIT objects depending on where the information about the commit was obtained from. However, it is not always possible to connect a USER to a GIT_USER account, actually it is rarely possible.

To fix this we need to create a method such that upon creating a new GIT_USER account and creating/linking to an EMAIL field that we also do the same for USER accounts. In this way we can traverse to all of a user's commit using USER->EMAIL->GIT_USER.

[pridkett]

Actually, this may be done in most cases.