Merge release-4-6 into master

Merge release-4-6 into master

Conflicts:
	src/gromacs/gmxlib/statutil.cpp (trivial)

To avoid unnecessary conflicts I reverted the following
changes from 4.6 before merging:

Because they are backports:
    Fixes for numeric and position selection variables
        caf863c4b51432db29429968c582073fda341865
    Add pdbname selection keyword.
        79f2d06a34715ea2950352a8cbf339423219d7d8.
Because it has to be redone different in master:
    Update use of CPack components and add install targets
        9628e27dcbd51f25d25e39feaef7cb9730bb9f51

Updated cmake/CreateManPage.cmake & cmake/BuildManPages.cmake
for bin location.

Change-Id: I467d75ad1af69712bf0cdddc9d48cd919eebc449