md5 checksum comparison for remote vs local
Merge pull request #17 from odeke-em/master

md5 checksum comparison for remote vs local
Code reorg.
hidden path discovery toggleable
Merge pull request #20 from odeke-em/master

hidden path discovery toggleable
Remove option fields from the context.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	changes.go
	cmd/drive/main.go
	commands.go
	init.go
	publish.go
	pull.go
	push.go
	remote.go
	types.go