lang: Add ability to create class objects

Bump copyright year

lang: Make sure module structures are const

lang: Make bytecode aware of module runtimes

lang: Use module class for class objects

lang: Add module class classes

lang: Add module runtime data helper class

lang: Split up module creation function

lang: Document module creation some more

lang: Rename create_modules to create_new_modules

lang: Use bool for in_stack

lang: Split list in to its own file

lang: Wrap object lists in an Object

lang: Move args_len to a runtime calculation

lang: Add reference counting to ObjectList

lang: Use getters and setters for object_list

lang: Use an object_list for use_modules

lang: Be explicit about ModuleInfo's constness

lang: Clarify usage of traverse_module_uses

lang: Rename module args to use_modules

lang: Pass dependencies to modules

lang: Switch to for loops for string iteration

lang: Create a module and find its dependencies in a new function

lang: Fix const uses for ModuleInfo

lang: Create modules and dependencies on request

lang: Don't double traverse visited modules

lang: Fix another off-by-one error

lang: Remove unused include

lang: Rename module_stack top to next

lang: Fix off-by-one error stack setting