Merge branch 'release/v0.4.2' into develop
serialized scene stores now pointers only
geometries and materials are loaded automatically now, if not present in the databases
Merge branch 'develop' into feature/deterministic_database_keys
added explicit loading functions to databases
Ignore executable.
Change to absolute database keys.
Bump version.
Merge branch 'release/v0.5.0'
Merge branch 'master' of github.com:vrsys/guacamole