Changed certificate error message on login to be less scary.

"Uh oh, couldn't confirm that the the login server connected to was owned by Mojang. You probably need to update your launcher."
Updated login.minecraft.net certificate. This should not be necessary, but something is broken with the certificate chain verification code.
[maven-release-plugin] prepare release mclauncher-3.1.6
[maven-release-plugin] prepare for next development iteration
Pragmatically disabled verification of downloads from custom sources.