Merge pull request #291 from hal3/master

tentatively working version of beam learn, other various cleanups
fix windows compile warnings
fix name change issue
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
unifying file and commandline options
test/RunTests: handle vw crashes and other abnormal terminations.
test/RunTests: fix undefined var $status
removed vm_file
vw-top-errors: new utility to uncover learning process biggest issues
recursive option traversal and discovery
new options parsing passes tests
make -q :: work on anonymous namespace
test/RunTests: fix undefined $TestNo warning
test/RunTests: remove redundant '(' in error.
utl/vw-top-errors: fully automate multi-stage process; add summary by feature; apply abs() to weights to determine importance
utl/vw-top-errors: FINISH ME no longer needed
clarified license
refactoring locations of some argument options
Merge pull request #294 from arielf/master

test/RunTests: handle vw crashes and other abnormal terminations.
more parse_args refactoring