Bump package versions for 1.5.1-rc.3 release.

Bump package versions for 1.5.1-rc.2 release.

Bump package versions for 1.6-beta.4 release.

Bump package versions for 1.5.1-rc.1 release.

Bump package versions for 1.6-beta.3 release.

Bump package versions for 1.5.1-rc.0 release.

Bump package versions for 1.5.1-beta.5 release.

Bump package versions for 1.5.1-beta.4 release.

This release should make the problem reported in meteor#8830 go away.

Bump package versions for 1.5.1-beta.3 release.

Bump package versions for 1.6-beta.2 release.