make comments match the code in secure channel implementation

quick fix for OOM panic that has been plaguing us

try harder to not send duplicate blocks

increase iptb test stability

fix append bug and overwrite/truncate bug

update iptb dependency again, and pick different ports for each iptb cluster

try and fix godeps crap

Improve parse_test.go

core/commands/internal/slice_util: Remove this unused package

godep: update go-msgio

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

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

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

Now also check that we get the right arguments from
the parsing.

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

Let's document how stdin enabled arguments currently
work by adding some tests.

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

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

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

Record Datastore metrics for flatfs and leveldb

Add package comments to packages that are missing them

write memory profiles every 30 seconds when enabled

dont create a new ticker each loop

Currently garbage collection is triggered manually and there are no
age-restrictions on the removal.  I expect we'll eventually follow Git
and auto-launch garbage collection when we hit some threshold of disk
consumption (gc.auto).  I expect we'll also follow Git and keep
unpinned or unreachable objects (gc.pruneexpire, etc.).  But we don't
seem to do either of those yet.

I'm not entirely clear on the role that this package is filling, but
this description seems like a reasonable guess based on a quick skim
through it's exported API.

The last references to CastToReaders were commented out in 6faeee83
(cmds2/add: temp fix for -r. horrible hack, 2014-11-11) and then
removed completely in 032e9c29 (core/commands2: Updated 'add' command
for new file API, 2014-11-16).

The last references to CastToStrings was removed in a0bd29d5
(core/commands2: Fixed swarm command for new arguments API,
2014-11-18).

So folks looking in core can figure out how it fits into the
repository as a whole.

Based on [1].

[1]: https://github.com/ipfs/go-ipfs/issues/1158

Add an OSX LaunchAgent plist

Fix/dial error hiding