Issue #269: Nukes legacy credentials storage
Fixes bucketOverrides mechanism
Updates podspec
Issue #267: Prevents early SPBucket init
Issue #271: [SPWebSocketInterface resetHeartbeatTimer] crash
Issue #273: Extend Logger and add Disk Persistance
Exposing SPLogger.h
Issue #273: Exposes Logfiles Folder URL
Issue #272: Adds Integration Test
Issue #272: Out of sync when following specific workflow
Issue #272: Updates comment
Merge branch 'develop' of https://github.com/Simperium/simperium-ios into develop