Project / Solution support

[juanfranblanco]

There is a need to identify a "solidity" project from others within the same "solution". The extension uses the root workspaces as the project folder due to the lacking of a Solidity project file as standard.

Solution will be to use the original "dapp" file as the project file (or something similar). This will be used as the root of the project and place to look for dependency libraries, either through node, lib or whatever is the configuration.