This commit looks big but it is really quite small.  Fixes some
matters arising from the first-pass attempt at IRifying cachegrind:

* Make all library-user visible functions have names that
  match either LibVEX_* or *IR[A-Z]*.

* Put a comment at the top of libvex_ir.h explaining the 
  naming scheme a little.

* Make a previously-private function public, giving eqIRAtom.



git-svn-id: svn://svn.valgrind.org/vex/trunk@1059 8f6e269a-dfd6-0310-a8e1-e2731360e62c
10 files changed