Update Servus to build Lexis to build Brayns with Brion

Linux travis

CMake output tweak

Fix overlapping memory regions, found by address sanitizer

Fix typo (#86)

Improved zerobufCxx.py for ipp files generation (#84)

No shallow submodules

Release preparation (#83)

clang-format (#81)

Fix const ZeroBuf vector iterator (#80)

Add to zerobuf::Vector: resize(), begin(), end() (#79)

Pretty-format JSON schema

Improve emitted doxygen documentation

Improve error output

Create CamelCase names for C++ functions from potential snake_case names