fix(peer) String() bounds check

TODO ensure correctness at ID generation and enforce this by only exposing functions that generate IDs safely. Then any peer.ID type found in the codebase is known to be correct.

presently, fails

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

The ouput from "ipfs help" changed in ipfs2.
With the change in this commit, this output change doesn't
prevent the test to pass.

Test t0010 now passes on my Linux machine.

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

The ouput from "ipfs block" changed in ipfs2.
With the change in this commit, this output change doesn't
prevent the test to pass.

Test t0050 now passes on my Linux machine.

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

The ouput from "ipfs add" changed in ipfs2.
With the changes in this commit, this output change doesn't
prevent the test to pass.

With TEST_NO_FUSE=1 test t0040 now passes on my Linux machine.

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

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

@jbenet @chriscool

(not to be merged into master) This is a hack to run sharness tests on
th ipfs2 binary. Instead of compiling cmd/ipfs, it compiles cmd/ipfs2
and copies this into test/bin/ipfs.

I thought this would be enough to pass the `basic-commands` test, but
it's not.

Although the output is fairly similar, the `ipfs version` test fails.

```
test (feat/test2) λ. diff version1 version2
1c1
< ipfs version 0.1.7
---
> ipfs version 0.1.5
```

I'm not very experienced with `sh` scripting, so perhaps I'm missing a
key ingredient or maybe misunderstanding the the tests are meant to
work.

Would like to get input on this.

Thanks, @maybebtc

Ipns Consistency

test(time)
expose time format var

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

Mount, Daemon, and Signal Handler Fixes

This is because if the user specifies that they want
to mount multiple times, something must be wrong. try
unmounting to reset things and then proceed.

This commit changes the signal handler to be added once
the command is executing. this is because the daemon
has its own signal handler, that must try to shut down
the node gracefully first. You know, just in case.

This commit adds a Mount abstraction (which is really just
a wrapped context closer). It makes sure to bind the mount
to the fate of the Node (i.e. close it if the node ends).
This fixes #350

add in a default file hash and cleaned up init function a bit

@maybebtc fixed it. cc @whyrusleeping

sorry everyone.