Distinguish different literla types from eachother
Fix inconsistencies in test descriptions
Remove benchmarks link as its not finished
Bundle vararg literals with other literals
Set function vararg as a parameter instead of a node attribute

Originally this was mirrored with the lua core compiler. There the
attribute is used for semantic analysis. Luaparse will more likely be
used for code scaffolding so to make it easier we keep the vararg as a
literal in the parameter list and remove the statement attribute.
Parse StringCallExpression argument as a literal.
0.0.3