Version bump after 4.6.7

Change-Id: I1f2e73c2b94f31b67e65bf7cf188fb542391ab4d
Fixes issue with vsiten and verlet buffers.

A loop counter for a loop over vsiten did not take into
account that multiple entries make up one vsiten
particle. Part of #1579.

Change-Id: Ic9a79e89ea9ef8f9f529c9d4a6c5cf05f65e9c7d
Merge branch release-4-6 into release-5-0

Conflicts:
	CMakeLists.txt
Left version stuff in release-5-0 alone, because they should be
unaffected by release-4-6 version bumps.

Change-Id: I000cba25affa818b9e4283e85ae8cdf61f7c53a1
Merge "Merge branch release-4-6 into release-5-0" into release-5-0