Compatibility with xmr-stak 2.3.0 and newer

[Robyer]

xmr-stak changed format of configuration files and xmr-stak-bootstrap must be adapted to work with version 2.3.0 and newer. There are various changes:

1. Now there are these files:

amd.txt
config.txt
nvidia.txt
cpu.txt
pools.txt

2. In nvidia.txt there is new field "sync_mode" : 3,
3. In amd.txt there are new fields: "mem_chunk" : 2, "comp_mode" : true,
4. pools.txt looks like this:

"pool_list" :
[
{"pool_address" : "", "wallet_address" : "

", "rig_id" : "<rig_id>", "pool_password" : "", "use_nicehash" : false, "use_tls" : false, "tls_fingerprint" : "", "pool_weight" : },
],
"currency" : "",

5. There are also some new command line attributes, but I'm not sure whether they are needed or not.

You can check the official repository https://github.com/fireice-uk/xmr-stak