minor cleanup

fixed some variable names to be consistent and a few typos

updated couple functions to be private for clarity since they are not
called outside of the class

added some log lines to help debug crashing when syncing large list
of pending messages.
fixed bug when syncing pending messages but service is not running

When sync service is not running if you sync pending messages it will
clear the list even though they did not sync, as if it worked normally.

Make default return value false on ProcessSms.routeMessages.

Added error message when service is not running.
remove unused param from routeSms() and cleaned up some comments.
Merge pull request #83 from mandric/develop

cleanup and bugfix