Cleaning up the docs.

Build user_eg.pro with qh_QHpointer

Order object files by frequency of execution for better locality.

Create libqhullp.a with qh_QHpointer=1 for qhullcpp.dll, etc.
  gcc has halved the cost of qh_QHpointer by using more space
Add <time.h> to user.h for CLOCKS_PER_SEC
Move ostream<<QhullFacetList from inline to compiled.
  It tripped a double define error like the other classes.
Remove ptr_intT from qh_matchvertices.  Not needed.
Fix name of qh_QHpointer