Extend protostream enc/decoder to basic types

[rigazilla]

Current protostream implementation only decodes user message, but protrostream has dedicated fields for basic types.
Each supported basic type has its own tag and accessor and needs to be managed correctly.
an example of code handling "basic types" vs "user message" in C# is here (this is improperly provided as part of the query feature)
An equivalent implementation is needed for the enc/decoderProtobuf

[rigazilla]

extension of the previous work for #72

[rigazilla]

Since there's only one numeric type in Javascript (Numeric which is an IEEE double), I would propose to simplify encoding work like this:
Encoding

Javascript	WrappedMessage OneOf Field
Number	wrappedDouble
Boolean	wrappedBoolean
String	WrappedString
ArrayBuffer	WrappedBytes

decoding

WrappedMessage OneOf Field	Javascript
every numeric field	wrappedDouble
WrappedString	String
WrappedBoolean	Boolean
WrappedBytes	ArrayBuffer

[rigazilla]

Implemented via #88 .
Enum type not implemented, leaved for future enhancement