License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

not immediately useful, but nice to have

tagging you to make sure i didn't make a mistake here @jbenet

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

eg.

```
ipfs2 (cmd-ref-part2) λ. go build ./...; ./ipfs2 tour 0

Tour 0 - Hello Mars

Hello Mars

ipfs2 (cmd-ref-part2) λ. go build ./...; ./ipfs2 tour 10

ERROR
    no topic with id: 10

TOPICS

    0 - Hello Mars
    0.1 - Hello Mars 2

```

This commit adds the pretty-complicated decision function
to check whether a command should run on the daemon.

@maybebtc @mappum double check the logic?

I didn't know there were dragons here.

When casting errors we've gotta be careful. Apparently both values and
pointers satisfy the error interface. Type checking for one doesn't
catch the other.

cc @whyrusleeping @mappum @jbenet

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

feat(commands) add ClientError(msg) helper and use it to return a fancy error to the client in the tour

@jbenet this exists now

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

Discovered this quirk about interfaces.

@whyrusleeping
@mappum
@jbenet

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

Also:
- map[cmds.EncodingType]cmds.Marshaller -> MarshalMap

cc @mappum @maybebtc

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

@mappum

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

boilerplate

I know you'll love this one @mappum

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

nil function

cc @jbenet @mappum

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

fixes #322

cc @mappum

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>