first working (maybe?) version of beam
fixed a few invalid reads
fixed memory leaks
memory bug fix
ldf working for searn
beam and ldf now working together
fixed beam bugs, got sequencespan working correctly, implemented bilou decoding
added todo list
vw-csv2bin util: allow negative #'s and #'s in scientific notation
The : wildcard for quadratic interactions doesn't seem to work on Mac.  Fixed with stringstreams.
Merge pull request #258 from mdagost/vw-csv2bin

vw-csv2bin util: allow negative #'s and #'s in scientific notation
Merge pull request #259 from mdagost/wildcards

Fixed the ":" wildcard for quadratic interactions on Mac.
Merge pull request #261 from arielf/master

Makefile: fix: s/wanning/warning/
refactor cost_sensitive definitions out of csoaa
add missing cs files
added a bunch of searn tests
integrated john's changes
added oneofmany test
simplified labels as per Jiang's suggestion
added missing files