fix comments ExtractAddress() -> ExtractDestination()
Add travis build:passing/failing indicator.
Fix a few "Uninitialized scalar field" warnings

Fix a few warnings reported by Coverity.
None of these is critical, but making sure that class fields are
initialized can avoid heisenbugs.
Merge pull request #4766

5a0823a Add travis build:passing/failing indicator. (randy-waterhouse)
Merge pull request #4772

87d9819 fix comments ExtractAddress() -> ExtractDestination() (jtimon)
Merge pull request #4777

8bdd287 Fix a few "Uninitialized scalar field" warnings (Wladimir J. van der Laan)
build: Remove message about Ubuntu 13.10 when no boost sleep implementation found

It's only confusing people into thinking that they should mess with
boost versions, which should not be necessary to get bitcoind to work.

If there is a bug in the build system with autodetecting boost it needs
to be solved not worked around.
rpc: Compute number of confirmations of a block from block height

Currently this uses a CMerkleTx, but that makes no sense as we
have the CBlockIndex available. As noted by @jgarzik.
Move CMerkleTx to wallet.cpp/h

It is only used by the wallet so it has no place in main.