Fixed the refs to bitcoin

Changed refs from bitcoin to dogecoin. Am I in the right branch this time?
Merge pull request #545 from IeuanG/patch-2

Fixed the refs to bitcoin
Fixed refs to bitcoin

Changed refs from bitcoin to dogecoin
Update INSTALL
Merge pull request #546 from IeuanG/patch-3

Fixed refs to bitcoin
change remaining printf to LogPrintf in miner.cpp
fix regtest mining in internal miner

Regtest-mode is a special case for the internal miner. The setgenerate
RPC code is written with this assumption. Code taken from current Bitcoin
0.9
Make rewards in regtest mode less random

This allows sane testing. Regtest mode is primarily intended for automated
testing, so this simplification makes sense
Fix bash based rpc tests
add bash rpc tests to travis