Adds Package class
Adds Package#initialize
Renames Bisu::VulnerabiliyParser to Bisu::VulnerabilityParser::Debian
Uses strings for Package.platform
Adds Platform#vulnerability_parser that returns the correct parser class
Adds Platform#vulnerabilities, removes #vulns from the Parser class
Adds BISU_ENV env variable to test_helper
Adds development dependency on mocha
Adds attr_accessors for :name, :version to Package
Properly sets platform, name, version on initialize for Package
Adds Package#platform_object
No need for Object.const_get in Platform#vulnerability_parser
Adds platform to VulnParser's vulnerability objects (and fixtures)
Requires mocha on test load
Adds CVE for drupal2 with different version number
Adds Package#vulnerabilities
Tests that Platform#vulnerability_parser returns one where platform is the same
Adds Package#vulnerable
Fixes Hound config to not complain about single quotes
Styleguide changes

  * Removes redundant curly brackets for hash arguments
  * Adds parentheses for method definitions with arguments
  * Adds blank lines around private
  * Adds spaces around default value assignment