Add MiningRequiresPeers chain parameter
Add MineBlocksOnDemand chain parameter
Add DefaultMinerThreads chain parameter
Add DefaultCheckMemPool chain parameter
Get rid of RegTest()
Move majority constants to chainparams
Add AllowMinDifficultyBlocks chain parameter
Add RequireStandard chain parameter
Add RPCisTestNet chain parameter
Get rid of TestNet()
Replace virtual methods with static attributes, chainparams.h depends on
protocol.h instead of the other way around
net.h was using std namespace through chainparams.h included in protocol.h
Use Params().NetworkID() instead of TestNet() from the payment protocol
Fix compiler warnings

Fixes the following compiler warning

```
miner.cpp: In constructor ‘COrphan::COrphan(const CTransaction*)’:
miner.cpp:69:14: warning: ‘COrphan::feeRate’ will be initialized after [-Wreorder]
     CFeeRate feeRate;
              ^
miner.cpp:68:12: warning:   ‘double COrphan::dPriority’ [-Wreorder]
     double dPriority;
            ^
miner.cpp:71:5: warning:   when initialized here [-Wreorder]
     COrphan(const CTransaction* ptxIn) : ptx(ptxIn), feeRate(0), dPriority(0)
```
Merge pull request #4304

02bec4b Fix compiler warnings (Drak)
Update translation_process.md

Qt changed to Bitcoin Core
Merge pull request #4307

16be392 Update translation_process.md (sandakersmann)
Get rid of the static chainMostWork (optimization)
Allow ActivateBestChain to release its lock on cs_main
Move all post-chaintip-change notifications to ActivateBestChain