Added check for valid wall_atomtype in .mdp

Otherwise, mdrun would dump core when the garbage got dereferenced.

Note that this does not need to be merged into release-4-6, because
c7a82654 already fixes it.

Fixes #700

Change-Id: I39f440595f7b112d4f01b5e32218ec45a2a97370
Merge "Added check for valid wall_atomtype in .mdp" into release-4-5-patches
Merge "Fix trjconv -sub with .trr files" into release-4-5-patches
Fix reading of g96 title

Change-Id: I5b077ef2f581d704848b658c588636c7510d3c38
Fix typo

Change-Id: Iba23e5cea570b2a283a19290774fe21b0e625cab
Merge release-4-5-patches into release-4-6

Conflicts:
	src/gmxlib/confio.c (whitespace only)

286575f0cd68 commit is not needed and is ignored
by this merge.

Change-Id: I7c4aabd918384aadbf6108501023ca77e019d6c1
Addendum for expanded ensemble options plus formatting fixes.

Change-Id: I4547fe74064593c939fcb292ccee056b49b292af