Use `module_exec` instead of `module_eval` whenever having variables
Merge pull request #24 from samnang/use_module_exec

Use `module_exec` instead of `module_eval` whenever having variables
Update other instances of module_eval to module_exec if it needed parameters
Merge pull request #25 from samnang/use_module_exec

Update other instances of module_eval to module_exec if it needed parameters