Doc and lint cleanups
Document the mux
More docs
Fix decoding tests

Fixes #11
use option's LONG format for option whose value is just 15 bytes

Close #10
inverted condition

Fixes #12
Increased coverage for option encoder
Tests for confirmable message
Test missing option
Test setting path with a leading slash
Added some tests for invalid message handling
Tests for serv mux
Path matching tests
Satisfy encoding.Binary{Unm,M}arshaler from Message

Close #14
Merge branch 'dustin-master'

Conflicts:
	message.go
Make option parsing trivial, reformat,