add metrics proto for ingesting metric points (lightstep#45)

Set protobuf and gogo dependencies LS-7541 (lightstep#35)

* Regenerate golang protos

* Add a version to make dep happy

* Reverts

* Reverts

* Set both protobuf and gogo versions to 1.0.0

* Remove file

* Bump gogo to 1.2.1

* Simplify makefile

run make proto against latest proto files (lightstep#36)

* run make proto against latest proto files

* add package file for dep

LS-4640 Widen clock skew to 64bits of micros (lightstep#30)

* Update deps

* Widen the clock correction field

Generate gogo and protobuf protos; give them distinct canonical packa…

…ge names (lightstep#27)

* All-In on Gogo means using (gogoproto.nullable) = false and (gogoproto.stdtime) for time fields

* And gogoproto.stdduration

* Update .gitignore

* Add placeholder to workaround golang/go#8279

* Working on test

* Use a vendor dir so the test can compile as a submodule

* Rename placeholder

* Remove TODOs

* Update .gitignore

* Add dependencies for the new test

* Cleanup protobuf dependency as much as possible

* aNeed this for imports

* Use a make rule

* Get the test to run

* Use new Makefile rules

* Include fakes

* Again...

* Use GOPATH-rooted includes

* Remap the import paths for LS protos

* Links working

* Add -f

* Rewrite .protos instead of link them

* Store translated copies of the .protos

* Remove stdduration feature

* Use int64 for micros consistently

* Get the Makefile from the docker iamge

* Revert collector.proto changes

* Restore lightstep.proto

* Regenerate protos

* Revert grpc version

* Fix

* Add the generated file

* Support multi-part GOPATH

* Fix

* Debug

* Test

* Uhhhhgggg

* Run dep

* Let's see

* Or this

* Try again

* Add removed files for benefit of non-Go builds