Merge pull request #354 from doxav/fixed_autogensh_linux

fixed autogen.sh for Linux compilation
enable to skip csv's first line (ie. header)
csv2bin: faster, can now specify numeric/categorical cols, thread writing, tags...
version before adding deque for csv2bin
csv2bin removed pop to compare performance
csv2bin set as a function
csv2bin cleaned and regex optimized
removed tracking autogenerated Makefile(s)
small improvements on vw-csv2bin
fixed loss computation on bs mean