edit 8.1.6 version history item, fix unrelated LaTeX error that caused
the manual not to build, and move this item to the 8.1.6 version history
 #3850
edit new 8.1.6 version history item.  Place the item in the 8.1.6
subsection of the version history. #4292
reorder some 8.1.6 version history items to have most important first.
Also add place holder for not-yet-written version history item that is
most important.
rewrite 8.1.6 version history item and place it into the 8.1.6
subsection of the version history. #4153
add 8.1.6 version history item about support for GPUs
add 8.1.6 version history item about experimental overlap of stage out
with new job execution #4291
add 8.1.6 version history item about experimental custom output
formatting. #4241
set 8.1.6 release date to May 22, 2014.
Merge branch 'V8_1_6-branch' of /p/condor/repository/CONDOR_SRC into V8_1_6-branch

Conflicts:
	doc/version-history/8-1.history.tex