Initial commit.
Tweak gemfile, README.
Initial esn validations/specs.
Clean up esn code.
Implement imei.
Make digit checks more thorough, add iccid implementation.
Remove mdn for now.
Fully remove mdn, fix iccid test.
Update the readme.
Fix readme.
Tweak readme.
Another readme tweak.
Remove newline.
Add typing/parsing of ids.
Test typing/parsing.
Bump version.
Remove newline.
Gsub leading zero so Integer plays nice, spec it.
Bump version
Add min support with specs.