v0.4.5

• generator: Fix returnErr() to handle interface types properly (#29)
• oas2: Parse httpcodec.FormFile fields correctly for file uploads (18ffa10)
• appx: Simplify cronapp/httpapp/mixedapp and add cronapp2 (47c69ba, 9783293)
• generator: Make ParseOptionPairs() a common utility function (0a0e000)
• generator: Add support for generating the Cron Job Handler (6cb4f49, 6df7791)
• docutil: Add Transport.Has() for inclusion judgements (c726dba)
• Use caseconv.UpperFirst instead of strings.Title (cc99725)
• Upgrade dependencies (274032a, 077ad3c, 3bebb28, 972e03d)