restore old pkg-config file
cmake install pkg-config
Merge pull request #16 from da2ce7/pkg_config

cmake install pkg-config
cppcheck: fix variableScope in opentxs-core
Merge pull request #15 from toxeus/fixScope

cppcheck: fix variableScope in opentxs-core
doc: include command for cleaning submodules and repo
Merge pull request #18 from da2ce7/doc_update_clean_git

doc: include command for cleaning submodules and repo
CMake: use system's ZMQ includes