v0.2.10

• Remove deprecated functions DecodeSliceToBasic()/EncodeBasicToSlice() and DecodeMapToStruct()/EncodeStructToMap()
• Remove deprecated package pkg/codec/http
• Cleanup werror.Error
• Improve the HTTP-test generator to handle variadic arguments properly
• Enhance @kok(body) to support optional tags "name" and "descr"
• Add support for request validation (#10)
• Upgrade appx and improve httpapp and cronapp