avoid ipvs collector to fail to initialize if sudo does not exist

and update the log msg to be more precise
log error when no conntrack metric was collected
update according to code changes
pythonic
Merge pull request #15 from hvnsweeting/fix-ipvs-initialize

Looks reasonable
update doc
Merge pull request #16 from hvnsweeting/refactor-conntrack-collector

Refactor conntrack collector
Build out a base collector with helper functions to handle running commands, with or without sudo, easier
Disable handlers when loading fails
Document uptime collector
Handle errors a bit better with doc building
Doc updates
Fix syntax error in icinga_stats collector

Commit fixes syntax error in icinga_stats collector - replace {} with [].
Adds an IP metrics collector
Removes empty documentation fields
Merge pull request #729 from zstyblik/pr-20140916-icinga-fix

Fix syntax error in icinga_stats collector
Merge pull request #731 from willroberts/ipcollector

IPCollector
Per #707, this updates the fixture
Fix arguments to hostname shell error
Merge pull request #733 from lightsofapollo/patch-1

Fix arguments to hostname shell error