Adjust logic in functions responsible for passing metrics in order to be able
to process them correctly in case where pass and drop are defined together.
started working on this with the idea of fixing #1623, although I
realized that this was actually just a documentation issue around
a toml eccentricity.
closes#1623
This will basically make the root directory a place for storing the
major telegraf interfaces, which will make telegraf's godoc looks quite
a bit nicer. And make it easier for contributors to lookup the few data
types that they actually care about.
closes#564
DanKans
Cameron Sparr
Thibault Cohen