make some methods private
periodically update host specs

and when SIGHUP sent
test tidied up
Merge pull request #15 from mackerelio/periodical-update-specs

Periodically update host specs
Merge pull request #9 from mackerelio/fix-access-modifiers

Make some methods private
Timout http reuquest in 30 sec (requries go 1.3)
prevent changing DefaultClient
for testablity
oops
Merge pull request #17 from mackerelio/timeout

Timout http reuquest in 30 sec (requries go 1.3)
Update CHANGELOG.md
Sharing the code to exit to prevent exiting without pidfile cleaning
Merge pull request #18 from mackerelio/safe-exit

Prevent exiting without pidfile cleaning
configure for posting metrics
change item names
refine item names
fix type
Merge pull request #19 from mackerelio/configure-retry

configuration for posting metrics
stop posting unused metrics
filter metrics in Generate function