Reimplement AST::DeclareCategory to generate its own bytecode
Fix AST::DeclareMeme#to_sexp
Rename AST::DeclareMeme to AST::DefineMeme
Add pos(g) to all other AST bytecode methods
Added parsing (or rather, ignoring) of comments
Rename proc_spec to procs_spec

--HG--
rename : spec/parser/proc_spec.rb => spec/parser/procs_spec.rb
Rename bindings_spec to memes_spec

--HG--
rename : spec/parser/bindings_spec.rb => spec/parser/memes_spec.rb
Remove Component#new (use Component#instance)
Started on BasicSpec, minimal in-language testing facility for scaffolding language tests