Add swarm command

basic ID cmd

feat(daemon) `ipfs daemon --initialized`

Warning: during normal execution node teardown must be the
last thing that happens because command requests return
io.Readers, which may still be constructing or processing
their output. The node (and its subservices) is needed for
this. good night and good luck.

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

looking forward to fixing these again

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

this is silly but whatever

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

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

@jbenet

yeah, these are just sane defaults

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

@jbenet

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

@jbenet

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

@jbenet

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

@jbenet

now, ipfs can be built and executed in one step:
```
docker run jbenet/go-ipfs daemon --initialized
```

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

@jbenet @whyrusleeping @mappum

very helpful for tracking down errors. the stack traces are only
shown when debug mode is visible. They function best when caught at the
source.

I propose we use this errors package as a drop-in replacement for
fmt.Errorf and errors.New in all of our code, and use errors.Wrap for
external errors as they emerge from others' libraries.

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

will support daemon initialization

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

# TYPES
# feat
# fix
# docs
# style (formatting, missing semi colons, etc; no code change):
# refactor
# test (adding missing tests, refactoring tests; no production code change)
# chore (updating grunt tasks etc; no production code change)
Signed-off-by: Brian Tiger Chow <brian.holderchow@gmail.com>

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

# TYPES
# feat
# fix
# docs
# style (formatting, missing semi colons, etc; no code change):
# refactor
# test (adding missing tests, refactoring tests; no production code change)
# chore (updating grunt tasks etc; no production code change)
Signed-off-by: Brian Tiger Chow <brian.holderchow@gmail.com>

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

# TYPES
# feat
# fix
# docs
# style (formatting, missing semi colons, etc; no code change):
# refactor
# test (adding missing tests, refactoring tests; no production code change)
# chore (updating grunt tasks etc; no production code change)
Signed-off-by: Brian Tiger Chow <brian.holderchow@gmail.com>

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

# TYPES
# feat
# fix
# docs
# style (formatting, missing semi colons, etc; no code change):
# refactor
# test (adding missing tests, refactoring tests; no production code change)
# chore (updating grunt tasks etc; no production code change)
Signed-off-by: Brian Tiger Chow <brian.holderchow@gmail.com>

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

@jbenet

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

Improve help messages

It takes some space and it looks like it
applies to the description too.

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>

Fix Option Validation

@jbenet @whyrusleeping @mappum

If we permit initialization in `ipfs daemon`, then we must ensure that
the node instantiated in `ipfs init` (to create the welcome file) shuts
down and releases resources.

Kept running into "resource temporarily unavailable". Discovered that it
was our cousins Jeff and Sanjay over at LevelDB Ave.

go-datastore doesn't expose Close() so I extended the TsDs interface and
submitted a patch.

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