Recommendations/snippets for module instantiations

[mattyoung101]

This probably will be a pain and depend on project indexing and #6

[mattyoung101]

When you type a cross-project module name, rather than recommending a keyword, it should recommend a snippet. The contents of the snippet will be auto generated by the server to instantiate the module. We should be able to get this using the current parse tree, as we know port directions as of 39fd08d