Including all lua files.
util/arg correctly returns module itself
Added test for NaNs

require 'util/nan' will replace some torch operators on DoubleTensors
and will give a warning for operations that will result in a NaN.
Updated README
Merge pull request #3 from akfidjeland/master

Added detection of NaNs
Add is_fn predicate.
Now deep_copy will also clone tensors.
arg handles nil default for optional arguments
Adding unzip and generic decompress_file functions.
Merge remote-tracking branch 'upstream/master'
making is_file return true for directories also
Merge branch 'master' of https://github.com/rosejn/lua-util
Adding unzip and arg parsing.
added util.is_empty
adding is_number and is_string predicates
File decompression deals with both .gz and .tar.gz

Previously tar.gz would be treated as pure (non-tarred) gz
Allowed to read from undeclared _PROMPT.