IOS-2735 comments out the calling code for disableAllSyncChannels(). It has known Engine issues causing crashes on grouped devices.

IOS-2743 diables the OS's auto locking while pEp Sync Wizard is shown. Background: Desktop pEps seem to take longer to show Sync Wizard and it sucks when the iOS device is then locked already while waitng.

IOS-2735 saves per-account-pepSync-enabled state in core data, uses that everywhere and enables only identities with CdAccount.pEpSyncEnabled on startup.

IOS-2736 adds static lib target for usage on macOS, changes code that need to be changed to be macOS 10.10 compatible.

IOS-2736 adds objc PEPLogger plus some build settings change to be able to mix Obj-C and swift in one project