Errors happens when compiling example asn files

[herugen]

Hi, there's errors happens when running with the example asn files in the repo, seems missing support of CHOICE type

$asn1go  rfc1155.asn1
Errors generating Go AST from module: 
  Ignoring unsupported type asn1go.ObjectIdentifierType{}
  Ignoring unsupported type asn1go.ChoiceType{AlternativeTypeList:[]asn1go.NamedType{asn1go.NamedType{Identifier:"simple", Type:"SimpleSyntax"}, asn1go.NamedType{Identifier:"application-wide", Type:"ApplicationSyntax"}}, ExtensionTypes:[]asn1go.ChoiceExtension(nil)}
  Ignoring unsupported type asn1go.ChoiceType{AlternativeTypeList:[]asn1go.NamedType{asn1go.NamedType{Identifier:"number", Type:asn1go.IntegerType{NamedNumberList:map[string]int(nil)}}, asn1go.NamedType{Identifier:"string", Type:asn1go.OctetStringType{}}, asn1go.NamedType{Identifier:"object", Type:asn1go.ObjectIdentifierType{}}, asn1go.NamedType{Identifier:"empty", Type:asn1go.NullType{}}}, ExtensionTypes:[]asn1go.ChoiceExtension(nil)}
  Ignoring unsupported type asn1go.ChoiceType{AlternativeTypeList:[]asn1go.NamedType{asn1go.NamedType{Identifier:"address", Type:"NetworkAddress"}, asn1go.NamedType{Identifier:"counter", Type:"Counter"}, asn1go.NamedType{Identifier:"gauge", Type:"Gauge"}, asn1go.NamedType{Identifier:"ticks", Type:"TimeTicks"}, asn1go.NamedType{Identifier:"arbitrary", Type:"Opaque"}}, ExtensionTypes:[]asn1go.ChoiceExtension(nil)}
  Ignoring unsupported type asn1go.ChoiceType{AlternativeTypeList:[]asn1go.NamedType{asn1go.NamedType{Identifier:"internet", Type:"IpAddress"}}, ExtensionTypes:[]asn1go.ChoiceExtension(nil)}

[chemikadze]

Not all types are supported, current impl is quite incomplete (this is somewhat experimental / playground project for me). I've added experimental support for CHOICE recently and some other types, rfc1155 should generate alright now.

I've sprinkled some skips in tests so it's more clear what does not work and why: https://github.com/chemikadze/asn1go/blob/master/examples/examples_test.go#L45