xmr-stak has several implementations for multi hash per thread.
The results into 3 intepedent implementations.
Each time the algorithm must be changed the possibility to introduce errors is very large.

- unify the different cryptonight CPU implementations
- simplify the function selection array to find the specilized cryptonight implementation
- add a intermediat pointer to access the large state (similar to the old multi hash implementation)

As side effect this change increases the speed of the single and multi hash algorithm.

fix #1505

- fix possible deadlock of the executor thread
- fix racecondition during the job consumation
- remove switch_work in all classes `minethd`
- move `consume_work` into `globalStates`

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

Remove whitespace lines

* CONF_NO_TLS fix

* gpu error fix + always return to sched after pin

- fix windows linker error during compile
- fix wrong parameter to call aeon (nvidia-backend)

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

- move source code to `src`
- categorize files and move to group folder
- change upper case class files to lower case
- change C++ header to `*.hpp`

- pass all singletons into the backend libraries
- move some cpu config features from the cpu config file to the global config.txt
- add global jconf to the xported singleton list