Basic semi-encoding and semi-decoding

src/error.rs

src/lib.rs

src/packet.rs

src/whisker/arbitrary.rs

src/whisker/comment.rs

src/whisker/destination.rs

src/whisker/gps.rs

src/whisker/identification.rs

src/whisker/mod.rs

src/whisker/route.rs

src/whisker/timestamp.rs

src/whisker/unknown.rs