Making McuManager accessible from Objective C and Xamarin

[philips77]

Fixes:

• Pod update
• Typo
• Making McuManager extend NSObject, which should help iOS binding from Xamarin, incomplete iOSMcuManagerLibrary.framework headers #215, probably

[lele4warp]

The generated .h is better but several functions are missing (DFU,logmanager etc....)

[philips77]

Right, could you add : NSObject to whatever is necessary?
Some Swift features, like OptionSet aren't available in Objective C, but I don't think we used them in this project.