add a blank composer.json
tell Git to ignore PhpStorm's files
describe the package
integrate PHPUnit 4.0.x
tell Git to ignore third-party components
tell Git to ignore the Composer's lock file
implement the random number generator

The code originates from MediaWiki's wfRandom() function: https://doc.wikimedia.org/mediawiki-core/master/php/html/GlobalFunctions_8php.html
add the LICENSE file
add PHPUnit configuration
add unit tests
set the version number to 1.0.0
Merge branch 'release-1.0.0'