No change in behavior. Get rid of specifiedConfirmTarget if/else block and
rename specifiedConfirmTarget and ignoreUserSetFee variables to
ignoreGlobalPayTxFee.
```
$ git blame src/policy/fees.cpp | grep becuase
3810e976 (2017-03-07 11:33:44 -0500 789) * checks for 2*target becuase we are taking the max over all time
$ git blame src/policy/fees.h | grep successfullly
2d2e1705 (2017-04-12 12:29:03 -0400 54) * representing that a tx was successfullly confirmed in less than or equal to
$ git blame src/wallet/feebumper.cpp | grep "hasen't"
a3878374 (2017-05-11 09:34:39 +0200 258) // make sure the transaction still has no descendants and hasen't been mined in the meantime
```
68af651 MOVEONLY: move TxConfirmStats to cpp (Alex Morcos)
2332f19 Initialize TxConfirmStats in constructor (Alex Morcos)
5ba81e5 Read and Write fee estimate file directly from CBlockPolicyEstimator (Alex Morcos)
14e10aa Call estimate(Smart)Fee directly from CBlockPolicyEstimator (Alex Morcos)
dbb9e36 Give CBlockPolicyEstimator it's own lock (Alex Morcos)
f6187d6 Make processBlockTx private. (Alex Morcos)
ae7327b Make feeEstimator its own global instance of CBlockPolicyEstimator (Alex Morcos)
Tree-SHA512: dbf3bd2b30822e609a35f3da519b62d23f8a50e564750695ddebd08553b4c01874ae3e07d792c6cc78cc377d2db33b951ffedc46ac7edaf5793f9ebb931713af
