Merge pull request #40 from eile/master

Cleanups to get new pkg_config FindPackages magic working for source-build tclap
Merge pull request #41 from eile/master

Switch TCLAP to our repository with fixes
Merge branch 'master' of https://github.com/Eyescale/Buildyard
Use PKG_CONFIG_EXECUTABLE in place of _FOUND, since the latter is not defined by cmake 2.8.4