New Solo-Kit Generate Command + Docs Generation

solo kit no longer runs as a plugin for protoc

to run:

go run solo-kit/cmd/main.go \
   -r <root of project> \
   -docs=true/false \
   [-i <include additional api directory>] # -i is a repeatable flag

0.1.6

Allow projects to generate based on vendored solo-kit.

0.1.5

Fixes for autogenerated tests.

0.1.4

add cliutils

0.1.3

Support plain (i.e. not yaml-encoded values) secrets via flag in secret client factory.

0.1.2

add stringutils

0.1.1

Adds nameutils package

0.1.0

Initial public solo-kit release