0.1.0

• Added: Composer\Semver\Comparator, various methods to compare versions.
• Added: various documents such as README.md, LICENSE, etc.
• Added: configuration files for Git, Travis, php-cs-fixer, phpunit.
• Break: the following namespaces were renamed:
  • Namespace: Composer\Package\Version -> Composer\Semver
  • Namespace: Composer\Package\LinkConstraint -> Composer\Semver\Constraint
  • Namespace: Composer\Test\Package\Version -> Composer\Test\Semver
  • Namespace: Composer\Test\Package\LinkConstraint -> Composer\Test\Semver\Constraint
• Changed: code style using php-cs-fixer.