Merge pull request #24 from digital-science/master

Added a plugin for Resmon
Add deps for Resmon
handle HTTP failures
refactor connection and get into its own method
results was defined but not used
Timeouts as options
Merge pull request #25 from digital-science/resmon_fixes

Riemann resmon improvements
Fix incorrect resmon host vars
Merge pull request #26 from digital-science/resmon_incorrect_vars

Fix incorrect resmon host vars