Fixed incorrect order of arguments in encrypt method

Merge pull request #3 from k0d3r1s/#2

Merge branch 'phpsed-master'

Merge phpsed's branch using parse method instead of constructor

Added Key class, updated Crypto class, updated encrypt-env prompts, u…

…pdated test files, updated README

Updated encrypt-env and Crypto

Fixed require path in encrypt-env

Added type and updated php version requirements in composer.json

Updated php versions for travis testing

Added CHANGELOG, fixed test class names for CryptoTest and ParserTest

Initial package commit