increase version to 2.1.0

Fix cli questions

CMake: fix wrong variable name

add psychocrypt's pgp key

Correct list order

Make sure we don't run without a username

update version

- add separate file for developer pgp key's

change `MICROHTTPD_ROOT` to `HWLOC_ROOT` within the hwlock section

thx @maztheman for spotting the bug

Grammar and wording regarding virus protection software

Correct name of optional feature

That's what it's called now: https://i.imgur.com/juZhtyz.png

Extend low_power_mode to do up to 5 cn hashes at a time.

Fix CLI option start + make cli option pool into an added pool with top priority ithinstead of overwrite

add issue and pull request templates

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 templates with importend information to optimize the support

add message that he not closed cmd can be safly closed

Fix nonce allocation

I chuckled reading that my virus protection software might flag the miner binary as “male ware,” and rewrote that section of the documentation.

fix broken pool option overwrite via CLI

The "low_power_mode" option in config.txt can be set to numeral values
between 1 and 5. A value of 5 seems optimal on certain processors
with large L4 cache.

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