add message to `CUDA_CHECK...` macros

allow to diable UAC dialog

- add macro `CUDA_CHECK_MSG_KERNEL` and `CUDA_CHECK_MSG`
- add suggestion of typicle errors can be solved

option to controll gpu synchronization

add message that he not closed cmd can be safly closed

fix broken pool option overwrite via CLI

Correct link to README.md

fix #340

With #90 the option to overwrite the pool settings via CLI options is broken.

This pull request will allow to overwrite the options of the pool with the highest weighting.

Clean up the x-mas tree

pass arguments to the restarted miner with high privileges

- remove CMake option `WIN_UAC`
- spawn UAC dialog via restarting xmr-miner with administrator right
- allow to disable UAC with `--noUAC`
- update documentation
- remove usage section with help message (output depends on OS)

Make k unsigned.

Clean up the x-mas tree

Right align hashrate report to six characters

[docs] Explicitly linked to an implied location

I expect that link is something that would be easily lost if another item is added.

optimize aes round command queue

add AMD scratchpad indexing option

fix Releases link

unroll AES round by hand to help the compiler to optimize the command queue

Change the default for strided index. Th euser feedback shows that strided_index = true will give a view hashes more per second.

Allow to change the indexing used to address the hash scratchpad memory.

- add option `strided_index` for each gpu

- add option `sync_mode`
- update auto suggestion and jconf

add environment variable `XMRSTAK_NOWIT`

- add documentation
- add environment variable `XMRSTAK_NOWAIT`

experimental warning: portable binaries

Really fixing incorrect Releases URL in README.md#Download

add warning that portable binaries are experimental

:)

Add custom message for dev -> user pool switch

Add custom message for dev -> user pool switch

update windows build documentation

fix CMake 

add hint that the new compiled xmr-stak-dep must be used for the new VS tool chain

- remove all `"${VARNAME}` usages in if conditions
- increase cmake minimum version to 3.1 to have the new behavior of [CMP0054](https://cmake.org/cmake/help/v3.1/policy/CMP0054.html)

- fix wrong compare for HWLOC not found
- remove usage of microhttpd variable if microhttpd is disabled

Adding Dockerfile and fixing build_xmr-stak_docker script