Update s3 plugin to v0.4.3
Remove own cacerts.rb because omnibus-software's cacerts.rb is already fixed
Remove flume plugin
Use rubygems 2.2.1 to avoid duplicated gem issue
Update bundled gem list.
Update fluentd to v0.10.57
Merge branch 'master' of https://github.com/treasure-data/omnibus-td-agent

Conflicts:
	config/projects/td-agent2.rb
Fix .gitignore; remove an erroneously added file.

- Replace td-agent -> google-fluentd in .gitignore
- Remove a file that got added as a result of not being in there.
  (this is an exact copy of templates/etc/init.d/deb/google-fluentd)