Add new line protocol parser and serializer, influxdb output (#3924)

.gitignore

Godeps

Makefile

agent/accumulator_test.go

agent/agent.go

internal/config/config.go

internal/models/makemetric.go

internal/models/running_aggregator_test.go

internal/models/running_input.go

internal/models/running_input_test.go

metric.go

metric/builder.go

metric/escape.go

metric/inline_strconv_parse_test.go

metric/metric.go

metric/metric_benchmark_test.go

metric/metric_test.go

metric/parse.go

metric/parse_test.go

metric/reader.go