Merge pull request #316 from adamv/homebrew

allow passing AC_PATH from environment
searn much faster with --quiet now
fixed bug
fixed stupid bug
Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit
Added name space prefix to latent factor to make it easier to identify movielens latent factors.
Generated human readable models for movielens demo. The latent factors can now be inspected.
Merge pull request #317 from hal3/master

searn faster with --quiet
fix spurious l1 prediction mode
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit

merge with jl master
vw-top-errors: better comments + add copyright/licence notes (same as vw)
Avoid uninitialized warnings on too few features or deviant examples
Switch to mean-of-weights by default.  Add -s option for sum-of-weights
poly:: misc cleanup

removed ssm
removed multiple hashes
did various poly code cosmetics
int -> size_t in allreduce tweakage
Merge branch 'master' into stagewise_poly

Conflicts:
	vowpalwabbit/Makefile.am
	vowpalwabbit/accumulate.cc
	vowpalwabbit/allreduce.h
	vowpalwabbit/parse_args.cc
Merge pull request #321 from arielf/vw-top-errors

vw-top-errors small bug fixes + allow sorting by sum as well as mean of weights
Change default ranking to relative-loss; add -a option for absolute.
Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit into vw-top-errors
Merge branch 'master' into stagewise_poly