Mining on iOS and other non-compliant browsers.

[nothingismagick]

This addresses the iOS issue that mining will not work with the miner we have set up.

The work around is to check if the platform is iOS - and not even show the mining logic. However, there may be cases on older browsers where the user is stuck at the "INIT" stage, and nothing changes for them. We should definitely make them aware of this situation - alert them to the problem, ask them if they want to send us a report - and dump their browser and device info if they agree.

Later this should be in their user preferences that they store in their APP. Generally speaking, this is a great paradigm for when things don't work like they should.