Enable Concurrent calls in Daemon : State Service Enhancements / New Proto

[anandrgitnirman]

It is expected that the user would call the GetChannelState to Determine the Current state of the Channel
Based on the usage forecast, the user/client will have to sign for an amount L + U , where L is the last amount Signed
and U is the amount based on expected usage.
Please be aware that the Signing up an amount upfront ( Pre Paid) does come with a risk and hence the
user must exercise caution on the amount signed specially with new service providers.
If there is no need of making concurrent calls then you may consider pay per mode.
Using a Token, the Client can now make concurrent calls, which was not supported previously with the pay per use