Merge branch 'master' of https://github.com/Eyescale/Buildyard
Merge pull request #56 from tribal-tec/master

Bump Boost version to 1.55, no tclap build on Windows
Integrate common CMake stuff using git externals, create BY Coverage target
Merge pull request #57 from eile/master

Integrate common CMake stuff using git externals, create BY Coverage target
Add doxygen to default install targets
Merge pull request #58 from eile/master

Add doxygen to default install targets
Fix bootstrapped BY
Cosmetics
Merge pull request #60 from eile/master

Fix bootstrapped BY
Add verbosity during travis build
Merge pull request #61 from eile/master

Add verbosity during travis build
Add support for snapshot modules