Updates to latest Arcavias Core and adapts layout path building
Fixes call to composer if it's already available
Merge branch 'master' of https://github.com/Arcavias/arcavias-demo
Merge branch 'master' of https://github.com/Arcavias/arcavias-demo
Uses default site with demo data
Merge pull request #43 from nsendetzky/master

Updates and adapts to latest Arcavias Core