Merge pull request #19 from kaz29/feat/ua_error

fix error when HTTP_USER_AGENT not defined

fix request error when ip address is too long

fix paramater type

Merge pull request #15 from kaz29/feat/exclude_with_agent

add exclude option

fix sync

add custom shutdown function

fix

change log sending to asynchronous

Merge pull request #12 from tamurayk/feat/add-custom-dimensions

add Method and Path to customDimensions

Merge pull request #11 from kaz29/feat/add_exclude_path

add exclude path setting to request log