Completely re-based for [python-fsrpcclient](https://github.com/FusionSolutions/python-fsrpcclient) lib.
Breaking changes for `Client` initialization:
- `hexNumbers` parameter is replaced with `convertNumbers`.
- `compression` parameter is replaced with `disableCompression`.
- `timeout` renamed to `transferTimeout`.
- `stopSignal` parameter is removed, instead of this we have added `signal` parameter for type `T_Signal` from [python-fssignal](https://github.com/FusionSolutions/python-fssignal) lib.
- `log` parameter type is replaced with [python-fslogger](https://github.com/FusionSolutions/python-fslogger) lib `Logger` class.
`FEIterator` now has new function: `hasNext`
During `with` statement the class is not cloned anymore. After exit the instance will be closed and reset.