Moneychanger doesn't compile using pkg-config provided paths without this.

Moneychanger includes "opentxs/...h" files all over the place,
and this fixes the problem.
Merge pull request #30 from keo/fix_pkgconfig

Moneychanger doesn't compile using pkg-config provided paths without this.  (Temporary Fix)
Merge pull request #42 from FellowTraveler/master

Fix for compiling OT when Keyring is configured ON.
Merge pull request #43 from FellowTraveler/master

Added OTASCIIArmor.hpp so OT builds w/ keyring ON.
Version bump (disambiguate the header mods).
Merge pull request #44 from randy-waterhouse/master

Version bump (disambiguate the header mods).
quick style fix for OTKeyring.cpp includes
Merge pull request #45 from da2ce7/master

Quick style fix for OTKeyring.cpp includes
change #include for relative path in .hpp files
fixed opentxs.pc.in since updated headers
fix for NULL in OTAsymmetricKey.hpp
change <ot_config.h> to ot_config.h
change <ot_config.h> to ot_config.h in stdafx.h
make irrXML.hpp included relatively in .hpp files
make zmq optional for header only compile
Merge pull request #46 from da2ce7/master

Fixes needed for Moneychanger.  Discovered in: https://github.com/Open-Transactions/Moneychanger/pull/67
tighten up disabled warning for windows
bump version to 0.91.a
Merge pull request #47 from da2ce7/master

Bump Version to 0.91.a (inc. some build mods for windows).
build wrappers linux fix