0.5.0

• 1d45685 Support e-mail addresses without host (fix #36) and add getCc() (David de Boer)
• 20aea76 Support unknown part types (ref #36) (David de Boer)
• 6283995 Improve authentication error handling (David de Boer)
• 9b1d147 Fix date comparison by adding timezone (David de Boer)
• 884fb8b Update description (David de Boer)
• 924497d Remove backslash before native functions (David de Boer)
• 49b62f0 Fix header decoding (#37) (David de Boer)
• ed44bee Fix #66 and #67 (David de Boer)
• accd0af Change minimum requirement to PHP 5.4 (David de Boer)
• fb2b053 Fix subject header decoding (fix #57, #67) (David de Boer)
• a8f73b2 Add search test and docs (David de Boer)
• 2fda77a Add delete test (David de Boer)
• b17117f Add community contributors to composer.json (David de Boer)