Added convertNSDateToISO8601 method to KIOEventStore to remove dependency on NSDateFormatter
Merged previous fixes
Tweaked sqlite threading
Updated sqlite date conversion method to include Etc/GMT as +
Removed all traces of NSDateFormatter
Refactored KEEN_LOGGING_ENABLED macro
Merge pull request #40 from keenlabs/31-nsdateformatter-is-not-thread-safe

Refactored NSDate formatting to be thread safe
Merge branch 'master' into 33-keen-logging-enabled-macro-is-misdefined
Merge branch 'master' into 32-non-shared-client-improvements
Merge pull request #41 from keenlabs/33-keen-logging-enabled-macro-is-misdefined

Refactored KEEN_LOGGING_ENABLED
Merge branch 'master' into 32-non-shared-client-improvements