tornelib-php-crypto

Pull request #4: Develop/6.1

Merge in LIB/tornelib-php-crypto from develop/6.1 to master

* commit '56aa7e8073c50c2f9b10c377c2b09fc3b2321a18':
  Making it possible to run mcrypt over openssl up to PHP 7.1 Also fixed an issue where PHP versions are compared up instead of down for mcrypt.
  Docblocks update.
  unit-file
  No coverage-xml allowed.
  IO depencey goes to tag instead.
  Minor changes in 6.1.0-crypto.
  Removed old module files.
  Prior docblock updated.
  unittest update
  * Switched all function controls to use Security::getCurrentFunctionState - this makes it easier to check if functions really are available. * Checking openssl vs mcrypt vs PHP >=7.1/<=7.0 availability. Will throw execeptions if openssl is absent and mcrypt is present in PHP 7.1 platforms. * Updated compression class. * Added docblocks. * Added minor test to check openssl presence.
  Restructured classes.
  composer.json fixed
  removed blocking requirements
  NonBackslashedComposerFile
  cryptolib update source refs
  Initiated crypto library