Handling for Amazon Linux clamav installation.

Amazon has their own version of clamav which obsoletes the epel version.
Ensure directory permissions on DB directory are set before freshclam executed.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	recipes/install_rpm.rb
Ensure clamav daemon is installed on Amazon Linux.
Unit test the new Amazon changes
Resolve Rubocop failures
Update gem sets
Switch Travis to DigitalOcean
Update Serverspec syntax
Remove unnecessary gems
Use patched resource_kit for Travis activesupport errors
Use prerelease Serverspec
Update README
Update CHANGELOG
Use Kitchen concurrency in Travis
Use Serverspec's platform attrs
Remove deprecated ClamukoScanOnAccess option
Give Ubuntu 12.04 the extra memory it needs to start clamd
Use more shared tests in the suites
Merge pull request #39 from RoboticCheese/roboticcheese/amazonplusplus

Amazon support plus some extras