Name now includes Lift Edition.

This is a simplification to the build to publish the module without the full Lift version in the module version number.  

This means rather than a Lift project depending on...

    "net.liftmodules" %% "omniauth" % "2.5-M4-0.7"

...it instead depends on:

    "net.liftmodules" %% "omniauth_2.5" % "0.7"

This is because the version number (2.5-M4-0.7) is not strictly a valid Maven version number, which causes problems for some people who run their own repository proxy.

Additionally, by including the Lift edition ("2.5") in the name of the module, we do not have the publish the module again for the whole life of Lift 2.5. (Unless the module changes, of course). 

I've made this change to all the "classic" Lift modules (paypal, textile, etc).

To demonstrate this, I've also published Omniauth as a SNAPSHOT:

    "net.liftmodules" %% "omniauth_2.5" % "0.7-SNAPSHOT"

and

    "net.liftmodules" %% "omniauth_3.0" % "0.7-SNAPSHOT"

If you accept this pull request, I'll go ahead and publish omniauith_2.5 version 0.7 as a non-snapshot if you wish.

Apologies: my editor removed some white space at the end of lines in the commit.