Improve LLVM-related documentation

[reviewed by Sung,Tom,Brad]

Reworks and adds meat to README.llvm. In particular includes
detailed descriptions of caveats, supported command line options,
and how it works.

Adds hopefully enough detail to the man page so
people can get a sense of what --llvm-wide-opt does.



git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@22087 3a8e244f-b0f2-452b-bcba-4c88e055c3ca
Adding some final changes to CONTRIBUTORS/CHANGES

Got late-arriving confirmation from Michael that Joe Yan should be
listed as a contributor to the current release for his contributions,
so added him back to current CONTRIBUTORS.

Also added a second entry about --llvm-wide-opt to the LLVM-specific
section.

And, it seems I hadn't added my own local changes to point to the new
Task Intents section in the spec, maybe because I was uncertain
whether or not they'd make it in?  Probably I just forgot, though.




git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@22088 3a8e244f-b0f2-452b-bcba-4c88e055c3ca
TRIAGE wrap-up:

Not too much else new to report.  Added the date that the
multilocale/diten/needMultiLocales/coforallon_maxThreads non-deterministic
failure occurred on gasnet-everything to the TRIAGE file.
studies/sudoku/dinan/sudoku-smart may have been fixed, but the next TRIAGEr
should check cray-xt.cray-prgenv-gnu.none.fifo.pthreads--linux64.gnu-std just
to be certain.  chpbld02 intel and cray target compiler builds failed this
weekend due to what looks to be an alteration to the compiler modules.  They now
load the xt-libsci/12.1.2 module and as a consequence when the -lsci flag is
thrown, our compiler has problems. Ryan has been informed and will email me back
as to whether this is a permanent or intended change.




git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@22089 3a8e244f-b0f2-452b-bcba-4c88e055c3ca
Fixing some formatting issues

Fixing some formatting issues in Michael's recent changes that caused
the man page to be badly formatted (the txt2man script is notoriously
sensitive to double-spaces after periods for some reason).  Remember:
always test your man edits after you make them!



git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@22090 3a8e244f-b0f2-452b-bcba-4c88e055c3ca