updated argmax
use close() instead of shutdown(RDWD)

See http://stackoverflow.com/questions/4160347/close-vs-shutdown-socket
Avoid warning: unused variable 'PRINT_DEBUG_INFO' [-Wunused-const-variable]
simplified predict and made it immutable
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
simplifying gd
eliminated sparse_dense.h
early terminate the parser when bfgs converges, originally from spaghettification
Merge pull request #301 from sam-s/master

use close instead of shutdown
add some direction concerning hadoop use
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
add help reference
add short option -B for --bootstrap
make option headers capitalization consistent
move comment on data-file without -d to where it belongs
Merge pull request #304 from arielf/master

add short option -B for --bootstrap
using computed types in gd.cc
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
something not working
more general computed types
unified updates
more update simplifications