Repeated should implement From et. al

[m4b]

Repeated is just a thin wrapper over vec. Instead of exposing just method, should implement from.

This way people can call into() and not worry about importing the crate just to call from_vec

Since it can’t fail this seems even more appealing.

Usecase: I only use protobuf as client. Importing protobuf crate just to call from_vec seems unnecessary.

[stepancheg]

Note that there are few functions implemented in #236, version is not released yet.

If more functions need to be added, PR is welcome.

Also, rust-protobuf codegen should have an option to generate fields of Vec type fields instead of RepeatedField. RepeatedField is an optimization, and it's not always needed.

[stepancheg]

Please reopen if this issue is still relevant.