V0.5.0

Closed issues:

• Incorrect escaping of < > #29
• Update tag for v0.4.0 #28
• Error parsing coments out of XML scope #27
• Support of xml comments #22
• Question on usage #20

Merged pull requests:

• Handle "doctype" elements. #34 (nfarina)
• Support XML comments #33 (nfarina)
• Correctly handle (discard) tags that come after the root XML document node #32 (nfarina)
• Add tests #31 (nfarina)
• Fixing #29 - Incorrect escaping of < > #30 (buholzer)