Add a checksum file check.
extend http check with a --response-code check, to be able to check for specific response codes
Merge branch 'master' into review_140108_add_a_response_code_option_to_the_http_check

Conflicts:
	plugins/http/check-http.rb
Remove trailing newlines
Merge pull request #421 from kalabiyau/remove_newlines_from_nodes_checker

Remove trailing newlines
Add server variable to host on Elasticsearch.
Fix validation on host.
Fix es-node-metrics also to avoid static server.
Tweak suggested line breaks
Didn't mean to include that file on this branch.
Fix cpu checks for older Linux kernels

Older Linux kernels don't have the "guest" field in /proc/stat.  While
check-cpu.rb claimed to accommodate that, it didn't actually work all
the way through.  Fix that, and also fix cpu-pcnt-usage-metrics.rb,
which didn't know about this at all.
Merge pull request #422 from rhoml/rhoml/remove-static-hostname

Remove static declaration on Elasticsearch nodes.
whitespace fix
Created check-service

Took the check-process script and added /svc to the task search.
This seemed like the easiest way to get searching working.

Tested and works as expected.
Make sure events going to flapjack contain a summary type of string.
Sensu warning events will now show up as warning events in flapjack rather than unknown.
Add DHCP server check.
travis offence: remove blank line
Merge pull request #426 from mrichar1/dhcp

Add DHCP server check.
Merge pull request #423 from petere/cpu-without-guest

Fix cpu checks for older Linux kernels