Add QualId to scala emacs output.
Initial work on Import.
Add error code for new line.
Add compilation unit tuple and import pairs to scala ast.
Add flag to scala lexer to indicate if current token has seen a nl.
Update scala parser in compUnit and Import. WIP.
Update parsing on StableId.
Update single and double quotes in grammar doc.
Update single and double quotes in ScalaAST.
Parse periodId.
Update grammar plainid with backticks.
Fix scala lexer parsing underscores.
Fix infinite loop due to WIP code.
Update scala parser test.
Fix bug parsing ImportExpr.
Update scala parser test.
Scala trait parsing. WIP.
Add trait error.
Parse TraitTemplate. WIP.
Parse TraitParents.