Bump loggregator_emitter to version 1.0

Signed-off-by: Casey McTaggart <cmctaggart@pivotallabs.com>
Log when upload begins

Hoping to see if we are entering the errback due to an EM HTTP
inactivity timeout
Merge remote-tracking branch 'origin/loggregator_emitter_v1'

Conflicts:
	Gemfile
	Gemfile.lock
Merge remote-tracking branch 'origin/log-staging'
Auto-merge remote-tracking branch 'upstream/master'