sumokoin is broken if `bfactor >= 5` is used (default for windows)
sumokoin for `sm_20` is broken due to the missing extern shared memory

- call phase3 kernel two times if sumokoin is enabled
- create extern shared memory for phase3 kernel

fix #1297

If sm_20 is mixed with other architectures the detection for the minimal supported architecture is broken.

- fix that version argument was not passed to extended kernel parameters

-rename `mining_fork_height` to `*_version`

- add `fork_height` to currency
- refactor algorithm selection

fix #1218

- remove inline function with ugly macro :-(

- documentation: change `aeon` to `aeon7`
- change `case` order in `switch` statements
- update README.txt

allow to disable the OpenCl cache
  - usefull for read only systems
  - usefull for unknown errors during cache reading

fix warning

```
/Users/user/xmr-stak/xmrstak/backend/amd/amd_gpu/gpu.cpp:481:11: warning: using the result of an assignment as a condition without parentheses [-Wparentheses]
                if( ret = clGetProgramInfo(ctx->Program, CL_PROGRAM_BINARIES, num_devices * sizeof(char*), all_programs.data(),NULL) != CL_SUCCESS)
```

- add new pow for AEON
- fix missing cryptonight-heavy selection for multi hashes

- remove call `IsCurrencyMonero` with `cn_select_memory`

fix #1202

revert #1198, the block size is limited to 84byte

move option `--currency` down

The OpenCl code is only supporting jobs up to 84byte

change warning when precompiled OpenCL code is not found

Co-authored-by: psychocrypt <psychocryptHPC@gmail.com>
Co-authored-by: fireice-uk <fireice-uk@users.noreply.github.com>
Co-authored-by: Lee Clagett <code@leeclagett.com>
Co-authored-by: curie-kief <curie-kief@users.noreply.github.com>

A redefinition of a variable in a local scope avoid that the intensity is rounded to a multiple of the work size.

Reduce OpenCL start time by using a self made compiler cache.

- store compiled OpenCL binary
- load OpenCl binary if available

- add project picosha2
- add license notes for picosha2

- reduce startup time for multi gpu systems
- initialize the GPU memory non concurrent

fix double definition of define `MEM_CHUNK`

guard error types those are only defined in OpenCL >1.1

- add new option `comp_mode` to the amd config
- disable `if guards` within opencl kernel if `comp_mode : false`

allow usage of Mesa OpenCl

- add new option for `strided_index`
- add additional option if `strided_index == 2` to controll the memory chunk with

initialize the log file as fast as possible after the start of the miner

reduce usage of registers: based on the suggestion of @enerc77