0.04	2015-03-19
	[ Documentation fix ]
	- fix usage of exec_commands

0.03	2015-03-18

	[ Bug fixes ]
	- fix gnuplot execution
	- remove obsolete Type::Tiny dependency
	- use File::Slurp::Tiny instead of File::Slurp

0.02	2015-03-18

	[ Bug fixes ]
	- check the presence of gnuplot
	- rename _is_ascii to _is_valid
	- change error msg for invalid char