Log Message:
Update to 0.54. From the changelog:

* Optional features required versions now builtin
* Updated copyright to 2014
* Prefer Data::Peek over Data::Dumper
* Support (and prefer) Spreadsheet::ParseXLSX for .xlsx
* Store CSV parse error - if any - in $ss->[0]{error}
* Link xlsgrep during install
* Added xlsgrep to examples
* Allow -C B,D for xlscat
* More prominent reference to xlscat in docs
* /dev/null cannot be used for tests on Windows
* Improve documentation consistency (RT#80409)
* Updated copyright to 2013
* Force old(er) tar format (ustar) - assumes GNU tar on release box
* Fix yml/json optional_features
* Install utilities from example by default
* Several minor changes (for maint)
* Note that empty sheets are skipped when clip is true (RT#75277)
* Allow undef as valid value for the options (Max Maischein)
* Don't generate warnings when stripping whitespace and only
  generating one of cells or rc. (Max Maschein)
* Fix test warning under perl-5.17.x
* Updated copyright to 2012
* Support passing attributes to the underlying parser
* Do not strip fields in sheets with no cells at all (RT#74976)