gui: remove redundant numTransactions tracking

This number was still tracked even though it's shown nowhere in the UI
anymore. It was originally removed because it didn't match the actual number of
records in the view (which contains outputs, not transactions) thus was
confusing people.
addrman: Do not propagate obviously poor addresses onto the network
Add bitcoin-tx tests

Testing: delin, delout, locktime, and basic createrawtransaction-like
functionality.
Remove link to now removed Windows Build Notes

Removed in
Merge pull request #4736

5d9f22b Remove link to now removed Windows Build Notes (Michael Ford)
Merge pull request #4733
Build-osx: Force Fix.

Removes the unnecessary directions that encourage people to force install openssl into /usr/local with Homebrew. Unnecessary, and potentially quite risky. @theuni okayed this removal [here](https://github.com/bitcoin/bitcoin/pull/4740#issuecomment-53076840).
Build-osx: Force Fix.

Kills the "make" line as well.
Merge pull request #4753

df920c6 Build-osx: Force Fix. (Dominyk Tiller)
5a61553 Build-osx: Force Fix. (Dominyk Tiller)
Merge pull request #4718

88fe88c gui: remove redundant numTransactions tracking (Wladimir J. van der Laan)
Merge pull request #4632
Merge remote-tracking branch 'bitcoin/master'