fix broken OpenCL 1.2 support

OpenCl 1.2.is not allowing the subscript operator on buildin vector types.

fix: use `.sX` to access vector components

increase version to 2.4.6

cryptonight_bittube2

5% more hash per second

Grammar fixes; mmap alloc failed error remark for Arch Linux.

WebUI Relative Links

- add cryptonight_heavy derivate cryptonight_bittube2
- add coin bittube
- remove coin ipbc because this coin is now called bittube

Buffer output in each line

fix wrong miner algorithm in result data

fix #1708

The extension of the job result contains the wrong algorithm used to create the nonce.
The fix provide now the correct used algorithm even if the coin is forking to a new algorithm.

- forward the used algorithm from the miner

remove cryptonight coins

- remove all cryptonight coins (algorithm cryptonight can still be used)
- update README.md

add ryo currency

optimize cn-heavy AMD

- add ryo currency
- update documentation

- explicit loop unrolling

based on changes in @imperdin fork https://github.com/imperdin/xmr-stak/blob/master/xmrstak/backend/amd/amd_gpu/opencl/cryptonight.cl

Fixed fork version for currency 'electroneum'

increase version to 2.4.5

Add support for CryptoNight Haven (small Heavy tweak)

- update pools.txt
- add new algorithm `cryptonight_haven`
- update all backends

Add Cryptonight-fast - Masari PoW variant

- rename cryptonight_fast to cryptonight_masari
- set dev pool to cryptonight_monero

increase version to 2.4.4

fix broken AMD APP SDK download links

remove definition of `_mm256_set_m128i`

fix duplicated nonce usage

AMD has removed the AMD APP SDK links from the website. The AMD employes in the AMD formum posted links to there Dropbox where the SDK can be downloaded)

version prepere for the next release

The define of `_mm256_set_m128i` is not needed and avoid intel compiler throws a warning about it.

- avoid that a nonce which not fits to the current job is used (check jobId after start nonce is consumed)
- move jobId check into the if condition to get a new bunch of nonces
- CPU: add jobId validation after the start nonce is consumed

fix possible deadlock with Volta