add Aeon support

- fix that currency selection is not called (in cli-miner.cpp)
- fix guard to prevent wrong currency selection if compiled for monero or aeon only

- rename all `xmr` to `monero`
- be insensitive while check for set currency
- add function to compate two strings insensitive

- update auto suggestion default and hwloc
- extent hash function table to support aeon and xmr within one miner

- add template parameter to kernel to support aeon and xmr
- update auto suggestion

- add compile parameter to support aeon and xmr
- update auto suggestion to handle aeon

... into a single place

- cli-miner.hpp:
  - add option `--currency`
  - add guided start section
- config.tpl: add value `currency`
- params.hpp: add value to store the selected currency
- executor.hpp: add dev pool address

- add CMake flag description
- announce Monero and Aeon in README.md
i add FAQ section

thread affinity for non cpu backends

- check if affinity vale before calling `thd_setaffinity`

amd: use 64bit target

This is a follow up of #43 and use the some mechanism to set the thread affinity for
non cpu backends correct.

- use cpu affinity workflow for nvidia and amd
- cpu: move messages of thread spawning before thread creation

- remove 32bit target value
- use always 64bit target for amd backend

remove double blob copy

- remove double copied memory

prefere AMD OpenCL over NVIDIA, Intel

Implement pool-controlled nonce allocation

fix #56

Search for AMD OpenCL inlcude path and libaries to prioritize the AMD implementation over NVIDIA and Intel.

Proper removal of gpu_thread_num

fix illegal memory access

fix CUDA 9 shuffle warning

add NVIDIA Volta support

fix assert in AMD backend

remove restricted pointer

fix bug announced in #52

If the miner is compiled in debug mode the assert condition results in a compile time error.

add `sm_70` if CUDA 9+ is avalable

use `__shffl_snyc` if CUDA 9+ is avalable

add order_fix for double hash