changed gitignore to accomodate atom

See https://github.com/atom/atom/issues/3660
switch over to using a lock file for daemon connections
respect the lock file, also cpu profile
don't load identity in offline mode (temp)

**For now**, we don't need to load/parse the private key
(which causes a signficant delay in commands) when doing
things entirely offline. This may change, and in that case
the private key should be loaded on demand.
core context + cancels

Erroring out in core setup should cancel the context
to ensure subsystems are shut down. This has to happen
all over the place we use contexts.

@perfmode @whyrusleeping
amendment to core context + cancels
const for lock file, + fix unreachable Close
fixed close sync issue
daemon_test: use proper temp dir
do init id offline, only dont parse keys

(test was failing)
vendor go-logging + camlistore/lock
Merge pull request #127 from jbenet/feat/snappy-cmd

Feat/snappy cmd