Webhooks (#55), more tests (#35) and python examples (#50)

Makefile

docs/publish.md

examples/publish-python/publish.py

go.mod

go.sum

server/server.go

server/server_test.go

tools/fbsend/README.md

util/embedfs/test.txt

util/embedfs_test.go

util/limit.go

util/limit_test.go

util/util_test.go